Mailing Standards of the United States Postal Service Domestic Mail Manual > 200 Commercial Letters, Cards, Flats, and Parcels > 220 Commercial Mail Priority Mail > 224 Postage Payment and Documentation
1.0 Basic Standards for Postage Payment
2.0 Postage Paid with Permit Imprint
Priority Mail commercial postage may be paid with:
In a postage-affixed Priority Mail mailing, the mailer must affix to each piece a value equal to at least the postage required (including any surcharges).
A mailer may be authorized to mail items without affixing postage when a permit imprint indicia (see 604.5.0) is used and payment is made at the time of mailing from a permit imprint advance deposit account established with the USPS for that purpose. This payment method may be used for postage and extra service fees.
Permit imprint mailings must contain at least 200 pieces or 50 pounds submitted under the terms of an approved manifest mailing system agreement with exceptions allowed under a minimum volume reduction provision.
A completed postage statement must accompany each mailing paid with a permit imprint.