With the exceptions noted below, a mailer may not deposit a First-Class Mail International item that requires a completed customs form into a collection box, lobby drop, Automated Postal Center (APC) drop, Postal Service lobby, Postal Service dock, or other unattended location. Mailers must present such items to a Postal Service employee at a Post Office facility or other location as designated by the postmaster. The Postal Service returns improperly presented items to the sender for proper entry and acceptance.
Exceptions: First-Class Mail International items that have the mailing label, customs form (including an electronic round stamp), and postage prepared and paid online through any of the following methods:
