Mailing Standards of the United States Postal Service, International Mail Manual > 2 Conditions for Mailing > 240 First-Class Mail International > 245 Mail Entry and Deposit
First-Class Mail International items bearing a computer-generated customs form with customs data that has been electronically transmitted (e.g., using Click-N-Ship service, an authorized PC Postage vendor, or the USPS Web Tools system) may be deposited through any of the following methods, provided postage is 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 bears only postage stamps when the item meets both of the following characteristics:
A customer must present the following First-Class Mail International items to an employee at a Post Office retail service counter:
Deposit and pickup methods listed in 245.11 are prohibited. The Postal Service will return an improperly presented item to the sender for proper entry and acceptance
Mailers who enter volume mailings paid with a permit imprint under 243.3 must enter such items through a business mail entry unit (BMEU) or, when authorized by the district BMEU manager, through a detached mail unit (DMU) at a mailer’s plant.