Mailing Standards of the United States Postal Service - Domestic Mail Manual > 100 Retail Mail Letters, Cards, Flats, and Parcels > 120 Retail MailPriority Mail > 126 Deposit
2.0 Pickup on Demand Service
Priority Mail weighing 13 ounces or less may be deposited into any collection box, mail chute, or mail receptacle or at any place where mail is accepted if the full required postage is paid with adhesive stamps. Metered mail must be deposited in locations under the jurisdiction of the licensing Post Office, except as permitted under 604.4.0.
Priority Mail weighing more than 13 ounces bearing only postage stamps as postage may not be deposited into a collection box, Postal Service lobby drop, Postal Service dock, customer mailbox, or other unattended location. These mailpieces are also precluded from pickup service. The sender must present such items to an employee at a retail service counter in a Postal Service facility. Improperly presented items will be returned to the sender for proper entry and acceptance.
Pickup on Demand service (507.7.0) is available for a fee only from designated ZIP Codes and can be requested online at www.usps.com.