• 07/30/2026
  • Announcements
    07/27/2026
    Release Notes
    07/27/2026
    Enterprise Payment System (EPS) Release Notes-July 26, 2026

    On Sunday, July 26, 2026, the United States Postal Service implemented the following software change:

    Enterprise Payment System (EPS) 8.6.0.0
    These Release Notes provide the contents of the release and affected subsystems.
    The section titled Corrections to Known Issues is derived from External Trouble Reports (ETRs) for inclusion in this release.
    This document is prepared based on the knowledge available at the time of its publication.

    Data Files
    07/27/2026
    Labeling List Changes Effective September 1, 2026

    Effective September 1, 2026, the Postal Service™ will revise Labeling List(s) L007, L008, L012, L016, L201, L606, and L607 to reflect changes in mail processing operations. Mailers are expected to label according to these revised lists for mailings inducted on or after the September 1, 2026, effective date through October 31, 2026, expiration date. The changes will be published in the Postal Bulletin, Issue #22708.

     

    Release Notes
    07/24/2026
    Technical Specifications
    07/24/2026
    Technical Specifications
    07/24/2026
    Release Notes
    07/23/2026
    Release Notes
    07/20/2026
    User Guides
    07/20/2026
    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.

    Presentations
    07/17/2026
    PS Form 3500 Application For Periodicals Mailing Privileges

    PS Form 3500 presentation for completing and submitting the application to the PCSC.