User Guides
01/22/2025
01/22/2025
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.
User Guides
01/22/2025
01/22/2025
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.