Final rule · 2026-21310

Customs Requirements and Payment Procedures for Certain Customs Charges

The Postal Service is revising Mailing Standards of the United States Postal Service, International Mail Manual (IMM[supreg]), in various sections, to update mailer responsibilities with respect to customs requirements and to establish procedures for the payment, or reimbursement, of any customs charges that are assessed, including after the purchase of postage.