Contact Siegel
6 West 48th Street
9th Floor
New York, NY 10036
Contact by phone:
New York: (212) 753-6421
Dallas: (214) 754-5991

Census of 1c Green, Perf 10 x 12 (formerly Scott 424b) (Scott 423D)
56 Census Records

Back to Census Summary of 423D
Back to the Siegel Census
423D-CAN-01

423D-CAN-01
Unknown

Notes:
    Provenance:
      Certificates:
      • PF 4037 Genuine
      Back to Top
      423D-CAN-02

      423D-CAN-02
      Unknown

      Notes:
        Provenance:
          Certificates:
          • PF 8701 Genuine
          Back to Top
          423D-CAN-03

          423D-CAN-03
          Unknown

          Notes:
            Provenance:
              Certificates:
              • PF 14287 Genuine
              Back to Top
              423D-CAN-04

              423D-CAN-04
              Unknown

              Notes:
                Provenance:
                  Certificates:
                  • PF 15717 Genuine
                  Back to Top
                  423D-CAN-05

                  423D-CAN-05
                  Unknown

                  Notes:
                    Provenance:
                      Certificates:
                      • PF 22165 Genuine
                      Back to Top
                      423D-CAN-06

                      423D-CAN-06
                      Unknown

                      Notes:
                        Provenance:
                          Certificates:
                          • PF 34473 Genuine
                          Back to Top
                          423D-CAN-07

                          423D-CAN-07
                          Sound

                          Notes:
                            Provenance:
                            • 5/19/2001, Siegel Auction Galleries, 2001 Rarities of the World, Sale 837, Lot 301, Realized $3,250
                            • 6/12/2004, Chesapeake Collection, Siegel Auction Galleries, The Chesapeake Collection of Compound Perforations, Sale 877, Lot 174, Realized $9,500
                            • 12/9/2010, Sirron Collection, Siegel Auction Galleries, The Sirron Collection of U.S. Perforation Rarities, Sale 1001, Lot 2031, Unsold
                            Certificates:
                            • PF 35394 Genuine
                            • PF 373574 Genuine
                            Back to Top
                            423D-CAN-08

                            423D-CAN-08
                            Fault

                            Notes:
                              Provenance:
                              • 6/27/2024, Siegel Auction Galleries, 2024 Rarities of the World, Sale 1326, Lot 4159, Realized $3,540
                              Certificates:
                              • PF 38508 (1972) Genuine, thin spot
                              Back to Top
                              423D-CAN-09

                              423D-CAN-09
                              Sound

                              Notes:
                                Provenance:
                                • 9/28/2005, H.R. Harmer
                                • 9/20/2012, Natalee Grace Collection, Siegel Auction Galleries, The Natalee Grace Collection of Used U.S. Stamps, Part Three: 1902 and Later Issues, Sale 1028, Lot 385, Realized $7,500
                                Certificates:
                                • PF 41068 Genuine
                                • PF 341417 Genuine
                                Back to Top
                                423D-CAN-10

                                423D-CAN-10
                                Fault

                                Notes:
                                  Provenance:
                                    Certificates:
                                    • PF 48939 Genuine
                                    • PF 471645 Genuine, light diagonal creases
                                    Back to Top
                                    423D-CAN-11

                                    423D-CAN-11
                                    Sound

                                    Notes:
                                      Provenance:
                                        Certificates:
                                        • PF 80620 (1979) Genuine
                                        • PF 482121 (2010) Genuine
                                        Back to Top
                                        423D-CAN-12

                                        423D-CAN-12
                                        Unknown

                                        Notes:
                                          Provenance:
                                            Certificates:
                                            • PF 85232 Genuine
                                            Back to Top
                                            423D-CAN-13

                                            423D-CAN-13
                                            Unknown

                                            Notes:
                                              Provenance:
                                                Certificates:
                                                • PF 93232 Genuine
                                                Back to Top
                                                423D-CAN-14

                                                423D-CAN-14
                                                Sound

                                                Notes:
                                                  Provenance:
                                                  • Rubin Collection, Matthew Bennet Auctions
                                                  • 5/13/2006, Siegel Auction Galleries, 2006 Rarities of the World, Sale 913, Lot 848, Realized $10,500
                                                  • 11/14-16/2018, Siegel Auction Galleries, United States Stamps including Confederate States and Hawaii, Sale 1192, Lot 487, Realized $4,250
                                                  Certificates:
                                                  • PF 93224 Genuine
                                                  Back to Top
                                                  423D-CAN-15

                                                  423D-CAN-15
                                                  Fault

                                                  Notes:
                                                    Provenance:
                                                      Certificates:
                                                      • PF 97856 Genuine, creasing
                                                      Back to Top
                                                      423D-CAN-16

                                                      423D-CAN-16
                                                      Fault

                                                      Notes:
                                                        Provenance:
                                                          Certificates:
                                                          • PF 97859 Genuine, diagonal crease at top left
                                                          Back to Top
                                                          423D-CAN-17

                                                          423D-CAN-17
                                                          Fault

                                                          Notes:
                                                            Provenance:
                                                              Certificates:
                                                              • PF 97857 Genuine, creasing and small thin spot
                                                              Back to Top
                                                              423D-CAN-18

                                                              423D-CAN-18
                                                              Sound

                                                              Notes:
                                                                Provenance:
                                                                • 12/8/2004, Siegel Auction Galleries, United States Stamps and Covers, Sale 889, Lot 1499, Realized $10,000
                                                                • 10/17/2006, Siegel Auction Galleries, United States Rarities, Sale 920, Lot 216, Realized $16,000
                                                                Certificates:
                                                                • PF 131502 Genuine
                                                                • PF 416576 Genuine
                                                                Back to Top
                                                                423D-CAN-19

                                                                423D-CAN-19
                                                                Fault

                                                                Notes:
                                                                  Provenance:
                                                                  • 6/2001, Floyd Collection, Shreves Philatelic Galleries
                                                                  • 6/12/2004, Chesapeake Collection, Siegel Auction Galleries, The Chesapeake Collection of Compound Perforations, Sale 877, Lot 175, Realized $5,500
                                                                  • 5/31/2016, Siegel Auction Galleries, 2016 Rarities of the World, Sale 1129, Lot 420, Realized $2,100
                                                                  Certificates:
                                                                  • PF 133050 Genuine
                                                                  • PF 139176 Genuine, faint diagonal crease at top right
                                                                  Back to Top
                                                                  423D-CAN-20

                                                                  423D-CAN-20
                                                                  Fault

                                                                  Notes:
                                                                    Provenance:
                                                                    • 3/23/2016, Kelleher, Sale 681, Lot 1852, Realized $2,700
                                                                    Certificates:
                                                                    • PF 150518 Genuine, corner crease at top right
                                                                    • PF 492604 Genuine, diagonal crease at top right and bottom left
                                                                    Back to Top
                                                                    423D-CAN-21

                                                                    423D-CAN-21
                                                                    Fault

                                                                    Notes:
                                                                      Provenance:
                                                                        Certificates:
                                                                        • PF 156034 Genuine, thinned
                                                                        Back to Top
                                                                        423D-CAN-22

                                                                        423D-CAN-22
                                                                        Unknown

                                                                        Notes:
                                                                          Provenance:
                                                                            Certificates:
                                                                            • PF 168879 Genuine
                                                                            Back to Top
                                                                            423D-CAN-23

                                                                            423D-CAN-23
                                                                            Fault

                                                                            Notes:
                                                                              Provenance:
                                                                              • 9/12/2000, Siegel Auction Galleries, United States Stamps, Sale 826, Lot 684, Realized $750
                                                                              • 10/26-29/2010, Siegel Auction Galleries, United States Stamps, Sale 997, Lot 5987, Realized $4,500, “slight creases”
                                                                              Certificates:
                                                                              • PF 172104 Genuine, slight crease
                                                                              • PF 492603 Genuine, faint horizontal crease at top right
                                                                              Back to Top
                                                                              423D-CAN-24

                                                                              423D-CAN-24
                                                                              Fault

                                                                              Notes:
                                                                                Provenance:
                                                                                • 4/28-30/2015, Hall Collection, Siegel Auction Galleries, The Robert R. Hall Collection of Outstanding United States Stamps, Sale 1096, Lot 676, Realized $1,100
                                                                                Certificates:
                                                                                • PF 243719 Genuine, vertical and diagonal creases, one ending in small tear
                                                                                Back to Top
                                                                                423D-CAN-25

                                                                                423D-CAN-25
                                                                                Sound

                                                                                Notes:
                                                                                  Provenance:
                                                                                  • 6/16/2007, Siegel Auction Galleries, 2007 Rarities of the World, Sale 937, Lot 244, Realized $37,500
                                                                                  • 4/29-30/2021, Gary Petersen Collection, Siegel Auction Galleries, The Gary Petersen Collection of Important United States Stamps, Sale 1234, Lot 332, Realized $11,500
                                                                                  Certificates:
                                                                                  • PF 215864 (1989) Genuine
                                                                                  Back to Top
                                                                                  423D-CAN-26

                                                                                  423D-CAN-26
                                                                                  Fault

                                                                                  Notes:
                                                                                    Provenance:
                                                                                    • 5/15/1999, Siegel Auction Galleries, 1999 Rarities of the World, Sale 811, Lot 191, unsold against a catalogue value of
                                                                                    • 3/28/2000, Siegel Auction Galleries, United States Stamps, Sale 821, Lot 1043, Realized $600, $600 hammer against a catalogue value of
                                                                                    • 11/14-16/2018, Siegel Auction Galleries, United States Stamps including Confederate States and Hawaii, Sale 1192, Lot 488, Realized $1,800
                                                                                    Certificates:
                                                                                    • PF 342199 (1999) Genuine with a small corner crease at top right and a shallow thin spot at right center
                                                                                    • PSE 1343655 (2018) Genuine, with a thin and small corner crease at top right
                                                                                    Back to Top
                                                                                    423D-CAN-27

                                                                                    423D-CAN-27
                                                                                    Sound

                                                                                    Notes:
                                                                                    • Not certified
                                                                                    Provenance:
                                                                                    • 10/8-10/1998, Zoellner Collection, Siegel Auction Galleries, The Robert Zoellner Collection of United States, Sale 804, Lot 617, Realized $525
                                                                                    Certificates:
                                                                                      Back to Top
                                                                                      423D-CAN-28

                                                                                      423D-CAN-28
                                                                                      Fault

                                                                                      Notes:
                                                                                        Provenance:
                                                                                        • 10/15-18/2001, Siegel Auction Galleries, United States Stamps, Sale 839, Lot 1545, Realized $1,500
                                                                                        • 12/9/2010, Sirron Collection, Siegel Auction Galleries, The Sirron Collection of U.S. Perforation Rarities, Sale 1001, Lot 2032, Realized $3,000, “small thin spot”
                                                                                        • 3/23/2016, Kelleher, Sale 681, Lot 1851, Realized $3,000
                                                                                        Certificates:
                                                                                        • PF 493648 Genuine, small thin spots at top left and upper right
                                                                                        Back to Top
                                                                                        423D-CAN-29

                                                                                        423D-CAN-29
                                                                                        Fault

                                                                                        Notes:
                                                                                        • Never certified
                                                                                        Provenance:
                                                                                        • 10/15-18/2001, Siegel Auction Galleries, United States Stamps, Sale 839, Lot 1546, Realized $900
                                                                                        • 12/9/2010, Sirron Collection, Siegel Auction Galleries, The Sirron Collection of U.S. Perforation Rarities, Sale 1001, Lot 2033, Realized $2,700, “light crease”
                                                                                        • 7/25/2018, Siegel Auction Galleries, United States Stamps, Sale 1187, Lot 580, Realized $2,100
                                                                                        Certificates:
                                                                                          Back to Top
                                                                                          423D-CAN-30

                                                                                          423D-CAN-30
                                                                                          Fault

                                                                                          Notes:
                                                                                            Provenance:
                                                                                            • 5/31/2003, Siegel Auction Galleries, 2003 Rarities of the World, Sale 863
                                                                                            Certificates:
                                                                                            • PSE 55932 Genuine, small diagonal crease at upper right
                                                                                            Back to Top
                                                                                            423D-CAN-31

                                                                                            423D-CAN-31
                                                                                            Unknown

                                                                                            Notes:
                                                                                            • Not certified
                                                                                            Provenance:
                                                                                            • Matthew Bennet Auctions, Lot 1504
                                                                                            Certificates:
                                                                                              Back to Top
                                                                                              423D-CAN-32

                                                                                              423D-CAN-32
                                                                                              Fault

                                                                                              Notes:
                                                                                              • Not certified
                                                                                              Provenance:
                                                                                              • 9/18/2002, Siegel Auction Galleries, U.S. Stamps & Covers, Sale 848, Lot 2167, Realized $1,200, “sealed tear at B., tiny thin spot”
                                                                                              Certificates:
                                                                                                Back to Top
                                                                                                423D-CAN-34

                                                                                                423D-CAN-34
                                                                                                Sound

                                                                                                Notes:
                                                                                                  Provenance:
                                                                                                  • 6/12/2004, Chesapeake Collection, Siegel Auction Galleries, The Chesapeake Collection of Compound Perforations, Sale 877, Lot 172, Realized $12,500
                                                                                                  • 5/8-9/2008, Hoffman Collection, Siegel Auction Galleries, The Jay Hoffman Collection of United States Stamps, Sale 956, Lot 418, Realized $55,000
                                                                                                  • 6/14/2024, William H. Gross Collection, Siegel Auction Galleries, Inc., The William H. Gross Collection: United States Stamps Complete, Sale 1323, Lot 272, Realized $8,850
                                                                                                  Certificates:
                                                                                                  • PF 415215 (2004) Genuine
                                                                                                  Back to Top
                                                                                                  423D-CAN-35

                                                                                                  423D-CAN-35
                                                                                                  Sound

                                                                                                  Notes:
                                                                                                    Provenance:
                                                                                                    • 10/9/2002, Drucker Collection, Siegel Auction Galleries, The Drucker Family Collection, Part 1: U.S. Stamps, Sale 851, Lot 371, Realized $4,250
                                                                                                    • 6/12/2004, Chesapeake Collection, Siegel Auction Galleries, The Chesapeake Collection of Compound Perforations, Sale 877, Lot 173, Realized $11,500
                                                                                                    • 12/9/2010, Sirron Collection, Siegel Auction Galleries, The Sirron Collection of U.S. Perforation Rarities, Sale 1001, Lot 2029, Unsold
                                                                                                    Certificates:
                                                                                                    • PF 391359 Genuine
                                                                                                    Back to Top
                                                                                                    423D-CAN-36

                                                                                                    423D-CAN-36
                                                                                                    Fault

                                                                                                    Notes:
                                                                                                      Provenance:
                                                                                                      • 2/2004, Matthew Bennet Auctions, Lot 410
                                                                                                      Certificates:
                                                                                                      • PF 410124 Genuine, reperforated at bottom
                                                                                                      Back to Top
                                                                                                      423D-CAN-37

                                                                                                      423D-CAN-37
                                                                                                      Sound

                                                                                                      Notes:
                                                                                                        Provenance:
                                                                                                        • 9/21/2004, Siegel Auction Galleries, United States Stamps, Sale 881, Lot 1099, Realized $5,750
                                                                                                        Certificates:
                                                                                                        • PF (1995)
                                                                                                        Back to Top
                                                                                                        423D-CAN-38

                                                                                                        423D-CAN-38
                                                                                                        Fault

                                                                                                        Notes:
                                                                                                          Provenance:
                                                                                                          • 10/19/2005, Siegel Auction Galleries, Rare and Superb United States Stamps, Sale 902, Lot 1242, Realized $4,250
                                                                                                          • 2/23-24/2015, Curtis Collection, Siegel Auction Galleries, The Curtis Collection: U.S. 20th Century and Air Post, Sale 1093, Lot 291, Realized $1,900
                                                                                                          Certificates:
                                                                                                          • PF 430183 Genuine, with a small corner crease at bottom left, some creases at top right and a tiny natural inclusion at the top of the head
                                                                                                          Back to Top
                                                                                                          423D-CAN-39

                                                                                                          423D-CAN-39
                                                                                                          Sound

                                                                                                          Notes:
                                                                                                            Provenance:
                                                                                                            • 2/27/2007, Siegel Auction Galleries, United States Stamps, Sale 930, Lot 2506, Realized $29,000
                                                                                                            • 12/9/2010, Sirron Collection, Siegel Auction Galleries, The Sirron Collection of U.S. Perforation Rarities, Sale 1001, Lot 2028, Unsold
                                                                                                            Certificates:
                                                                                                            • PF (1999)
                                                                                                            Back to Top
                                                                                                            423D-CAN-40

                                                                                                            423D-CAN-40
                                                                                                            Sound

                                                                                                            Notes:
                                                                                                              Provenance:
                                                                                                              • 12/9/2010, Sirron Collection, Siegel Auction Galleries, The Sirron Collection of U.S. Perforation Rarities, Sale 1001, Lot 2030, Unsold
                                                                                                              Certificates:
                                                                                                              • PF 474161 Genuine
                                                                                                              Back to Top
                                                                                                              423D-CAN-41

                                                                                                              423D-CAN-41
                                                                                                              Fault

                                                                                                              Notes:
                                                                                                                Provenance:
                                                                                                                  Certificates:
                                                                                                                  • PF 496478 Genuine, small corner crease at bottom right and small thins
                                                                                                                  Back to Top
                                                                                                                  423D-CAN-42

                                                                                                                  423D-CAN-42
                                                                                                                  Fault

                                                                                                                  Notes:
                                                                                                                    Provenance:
                                                                                                                      Certificates:
                                                                                                                      • PF 493647 Genuine, diagonal crease at top right
                                                                                                                      Back to Top
                                                                                                                      423D-CAN-43

                                                                                                                      423D-CAN-43
                                                                                                                      Fault

                                                                                                                      Notes:
                                                                                                                        Provenance:
                                                                                                                          Certificates:
                                                                                                                          • PF 487714 Genuine, with creases, and reperforated at bottom where there is also a small tear
                                                                                                                          Back to Top
                                                                                                                          423D-CAN-44

                                                                                                                          423D-CAN-44
                                                                                                                          Fault

                                                                                                                          Notes:
                                                                                                                            Provenance:
                                                                                                                            • 5/10/2022, Kelleher, US & Worldwide Stamps & Postal History, Sale 769, Lot 2355
                                                                                                                            Certificates:
                                                                                                                            • PF 486875 (2010) Genuine, with a small thin spot at right
                                                                                                                            Back to Top
                                                                                                                            423D-CAN-45

                                                                                                                            423D-CAN-45
                                                                                                                            Fault

                                                                                                                            Notes:
                                                                                                                              Provenance:
                                                                                                                              • 6/25/2013, Siegel Auction Galleries, 2013 Rarities of the World, Sale 1048, Lot 355, Unsold
                                                                                                                              Certificates:
                                                                                                                              • PF 477822 Genuine, thinning and light creases
                                                                                                                              • PF 477822 Genuine, thinning and light creases
                                                                                                                              Back to Top
                                                                                                                              423D-CAN-46

                                                                                                                              423D-CAN-46
                                                                                                                              Fault

                                                                                                                              Notes:
                                                                                                                                Provenance:
                                                                                                                                  Certificates:
                                                                                                                                  • PF 477822 Genuine, with a small internal vertical crease, some creases at top right, and a tiny staple hole at bottom left, above the numeral "1
                                                                                                                                  Back to Top
                                                                                                                                  423D-CAN-47

                                                                                                                                  423D-CAN-47
                                                                                                                                  Fault

                                                                                                                                  Notes:
                                                                                                                                    Provenance:
                                                                                                                                    • 11/19/2013, Siegel Auction Galleries, United States Stamps, Sale 1061, Lot 3909, Realized $2,600
                                                                                                                                    Certificates:
                                                                                                                                    • PF 509581 Genuine, faint diagonal creases at top left and top right
                                                                                                                                    Back to Top
                                                                                                                                    423D-CAN-48

                                                                                                                                    423D-CAN-48
                                                                                                                                    Fault

                                                                                                                                    Notes:
                                                                                                                                      Provenance:
                                                                                                                                        Certificates:
                                                                                                                                        • PF 509580 Genuine, with thins, small creases, a tiny tear at upper right and central toning
                                                                                                                                        Back to Top
                                                                                                                                        423D-CAN-49

                                                                                                                                        423D-CAN-49
                                                                                                                                        Sound

                                                                                                                                        Notes:
                                                                                                                                          Provenance:
                                                                                                                                          • 5/10/2022, Kelleher, US & Worldwide Stamps & Postal History, Sale 769, Lot 2356
                                                                                                                                          Certificates:
                                                                                                                                          • PSE 00081380 (2002) It is genuine
                                                                                                                                          • PF 520555 (2014) It is genuine
                                                                                                                                          Back to Top
                                                                                                                                          423D-CAN-50

                                                                                                                                          423D-CAN-50
                                                                                                                                          Fault

                                                                                                                                          Notes:
                                                                                                                                            Provenance:
                                                                                                                                              Certificates:
                                                                                                                                              • PF 517879 It is genuine, with a perforation thin at top, the third perf from the left
                                                                                                                                              Back to Top
                                                                                                                                              423D-CAN-51

                                                                                                                                              423D-CAN-51
                                                                                                                                              Fault

                                                                                                                                              Notes:
                                                                                                                                                Provenance:
                                                                                                                                                • 12/19/2017, Siegel Auction Galleries, United States Stamps and Hawaii, Sale 1172, Lot 722, Realized $1,900, "light scattered toned spots"
                                                                                                                                                Certificates:
                                                                                                                                                • PF 547712 Genuine, with light scattered toned spots
                                                                                                                                                Back to Top
                                                                                                                                                423D-COV-01

                                                                                                                                                423D-COV-01
                                                                                                                                                Sound

                                                                                                                                                Notes:
                                                                                                                                                  Provenance:
                                                                                                                                                  • 11/18/2011, Spink, Sale 137, Realized $21,000
                                                                                                                                                  Certificates:
                                                                                                                                                  • PF 494546 (2011) Genuine usage
                                                                                                                                                  Back to Top
                                                                                                                                                  423D-COV-02

                                                                                                                                                  423D-COV-02
                                                                                                                                                  Fault

                                                                                                                                                  Notes:
                                                                                                                                                    Provenance:
                                                                                                                                                      Certificates:
                                                                                                                                                      • PF 500516 (2011) Genuine usage, stamp with small piece out at top left
                                                                                                                                                      Back to Top
                                                                                                                                                      423D-COV-03

                                                                                                                                                      423D-COV-03
                                                                                                                                                      Sound

                                                                                                                                                      Notes:
                                                                                                                                                      • Single, Mount Vernon Wa. Dec. 23, 1914 waving flag machine cancel on post card to Dell Rapids, South Dakota
                                                                                                                                                      Provenance:
                                                                                                                                                        Certificates:
                                                                                                                                                        • PF 517857 (2014) It is a genuine usage
                                                                                                                                                        Back to Top
                                                                                                                                                        423D-COV-04

                                                                                                                                                        423D-COV-04
                                                                                                                                                        Fault

                                                                                                                                                        Notes:
                                                                                                                                                        • MOUNT VERNON WA. DEC. 19 1914 WAVING FLAG MACHINE CANCEL, ON POSTCARD TO SOUTH DAKOTA.
                                                                                                                                                        Provenance:
                                                                                                                                                          Certificates:
                                                                                                                                                          • PF 517856 (2014) Genuine, the stamp with a piece out at top left
                                                                                                                                                          Back to Top
                                                                                                                                                          423D-COV-05

                                                                                                                                                          423D-COV-05
                                                                                                                                                          Fault

                                                                                                                                                          Notes:
                                                                                                                                                          • MOUNT VERNON WA. DEC. 31 1914 WAVING FLAG MACHINE CANCEL, ON POSTCARD TO SOUTH DAKOTA
                                                                                                                                                          Provenance:
                                                                                                                                                            Certificates:
                                                                                                                                                            • PF 517855 (2014) Genuine usage, the stamp with some toned perforations
                                                                                                                                                            Back to Top
                                                                                                                                                            423D-COV-06

                                                                                                                                                            423D-COV-06
                                                                                                                                                            Sound

                                                                                                                                                            Notes:
                                                                                                                                                              Provenance:
                                                                                                                                                              • 4/23/2024, Siegel Auction Galleries, United States Stamps, Sale 1320, Lot 1675, Realized $3,835
                                                                                                                                                              Certificates:
                                                                                                                                                              • APS 182380 (2008) Genuine
                                                                                                                                                              • PF 601609 (2024) Genuine
                                                                                                                                                              Back to Census Summary of 423D
                                                                                                                                                              Back to the Siegel Census
                                                                                                                                                              Copyright 2025. All rights reserved by Siegel Auction Galleries Inc. Information and images may be used with credit to Siegel Auction Galleries or siegelauctions.com subject to guidelines and restrictions.
                                                                                                                                                              Website Terms of Use and Privacy Policy