DMM TOC > 100 Retail Letters, Cards, Flats, and Parcels > 120 Priority Mail|
1.1 Payment Method
Priority Mail Forever Prepaid Flat Rate packaging must be purchased by credit card online at www.usps.com and bears a shipping label with affixed Forever Prepaid postage. Mailers adding extra services must take packages to a retail Post Office location for payment of the associated fees for each extra service added. USPS Tracking (electronic option) is included at no additional cost.