User Guides
10/18/2023
10/18/2023
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
10/18/2023
10/18/2023
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.