User Guides
07/02/2024
07/02/2024
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
07/02/2024
07/02/2024
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.