Mailpieces bearing postage evidencing indicia must be deposited in a collection box (except for mailings of 200 or more Critical Mail flats) or at a postal facility within the ZIP Code shown in the indicia, except as permitted under 2.0 or 604.4.5.3. Permit imprint mail must be presented at a Post Office or USPS acceptance site under 604.5.0, or 705.
1.2 Stamped Pieces
Priority Mail bearing postage stamps is retail mail. See 126 for more information.