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.

  • 07/17/2026

    PS Form 3500 Application For Periodicals Mailing Privileges

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

  • Release Notes
    07/17/2026
    Error Codes
    07/17/2026
    Applications/ Forms
    07/17/2026
    NCOALink® Software Developer License Agreement v29 (7/15/2026)

    This agreement licenses the development of software interfaces for the NCOALink® product.

    Applications/ Forms
    07/17/2026
    NCOALink® End User License Agreement v30 (7/15/2026)

    This agreement licenses the use of the NCOALink® product to an "End User Licensee".

    Applications/ Forms
    07/17/2026
    NCOALink® Software Interface Distributor License Agreement v30 (7/15/2026)

    The software agreement for NCOALink® governs the distribution of licensee's certified NCOALink® software interface.

    Applications/ Forms
    07/17/2026
    NCOALink® Limited Service Provider License Agreement v30 (7/15/2026)

    This agreement licenses the use of the NCOALink® product to a "Limited Service Licensee".