This document amends U.S. Customs and Border Protection (CBP) regulations by removing some of the requirements for documentation used to establish proof of exportation for drawback claims. Currently, claimants must provide originally signed documentary evidence or a certified copy of such documentary evidence to establish the date and fact of exportation of articles for drawback purposes. This document also amends various sections of title 19 of the Code of Federal Regulations (CFR) to reflect that there is no longer a legal requirement that the export invoice for mail shipments be certified. Additionally, this document amends Appendix B to part 191 of title 19 so that the Appendix reflects previous regulatory amendments closing four drawback offices. Finally, this document amends CBP regulations to reflect the change from the legacy agency name of U.S. Customs Service to the current agency name of U.S. Customs and Border Protection and to make other non-substantive editorial changes.