User Guides
09/27/2013
09/27/2013
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
09/27/2013
09/27/2013
International Merchant Returns API: User Guide
This user guide provides examples of the XML transactions to the USPS International Merchant Returns web service and guidance for installation.