User Guides
08/10/2021
ePostage® Integration Guide

The purpose of this document is to provide integration requirements and best practices for software developers creating an ePostage shipping solution utilizing the USPS Electronic Verification System (eVS). These requirements are provided in addition to those identified in the Publication 205, eVS® Business and Technical Guide which remains the main source document for eVS integration.

Publications
08/09/2021