Announcements
08/26/2025
DELIVERY - Atlantic Area – North Carolina District Hurricane Erin - Offices Reopened
Contact Lists
08/26/2025
Polywrap Manufacturer List
User Guides
08/26/2025
Domestic Merchant Returns API: User Guide

This user guide provides examples of XML transactions to the USPS Merchant Returns web service and guidance for installation.

Quick Service Guides
08/26/2025
PostalOne!® Contingency Plan
Program Requirements
08/25/2025
2026 Add-Ons