Mailing Standards of the United States Postal Service, International Mail Manual > 2 Conditions for Mailing > 270 Free Matter for the Blind > 275 Mail Entry and Deposit
Eligible Free Matter for the Blind items bearing a computer-generated customs form with customs data that has been electronically transmitted may be deposited through any of the following methods provided any extra service fees have been paid by a means other than the use of postage stamps:
Note: A mailer may use the aforementioned methods to deposit a First-Class Mail International letter-size or flat-size item that meets both of the following characteristics:
A customer must present the following eligible Free Matter for the Blind items requiring a customs form to an employee at a Post Office retail service counter:
Deposit and pickup methods listed in 275.1 are prohibited. The Postal Service will return an improperly presented item to the sender for proper entry and acceptance.