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.

Release Notes
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".

Announcements
07/17/2026
Modifications to NCOALink® Licenses

This document provides information on modifications to NCOALink® licenses.

Applications/ Forms
07/17/2026
NCOALink® Full Service Provider License Agreement v36 (7/15/2026)

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

Applications/ Forms
07/17/2026
LACSLink® End User License Agreement

This document contains the End User License Agreement for LACSLink®.

Fact Sheets
07/17/2026
Licensing Fees

This document contains information about licensing fees for USPS® Licensed Products.

Applications/ Forms
07/16/2026
Mail Processing Equipment (MPE) Data User License Agreement

This agreement licenses the use of the NCOALink Product with Mail Processing Equipment.

Announcements
07/16/2026
Modifications to NCOALink® MPE Licenses and Supporting Documents (7/14/2025)

This document provides information on licenses and supporting documents for Mail Processing Equipment for NCOALink®.

Applications/ Forms
07/16/2026
MPE Developer License

This agreement licenses the development of software interfaces for the NCOALink® Mail Processing Equipment. 

Applications/ Forms
07/16/2026
DPV® License Agreement

This document contains the License Agreement for DPV®.

Applications/ Forms
07/16/2026
MPE Interface Distribution License Agreement

This agreement governs the distribution of licensee's certified NCOALink® mail processing equipment software interface.

Announcements
07/16/2026
Modifications to LACSLink® Licenses and Supporting Documents

This document lists modifications to LACSLink® licenses and supporting documents.

Applications/ Forms
07/16/2026
LACSLink® Software Distribution License Agreement

This document contains the licensee agreement for LACSLink® software distribution.

Applications/ Forms
07/16/2026
LACSLink® Developer License Agreement

This document contains the developer license agreement for LACSLink®.

Announcements
07/16/2026
Modifications to DSF2® License and Supporting Documents

This document lists modifications to the DSF2® license agreement and supporting documents.

Applications/ Forms
07/16/2026
DSF2® License Agreement

This document provides a license agreement for DSF2®.

Announcements
07/16/2026
Modifications to DPV® License and Supporting Documents

This document lists modifications to the DPV® license agreement and supporting documents.

Fact Sheets
07/14/2026
Catalog Incentive Fact Sheet

Catalogs offer a unique marketing perspective to products and services and provide important value to the mailbox. As part of the July 14, 2024 price change, USPS published a new Catalog definition in the Domestic Mail Manual. Simultaneously, the Postal Service is offering a Catalog Incentive price discount of $0.001 per mailpiece to Catalog mailers who comply with the new Catalog definition and meet all other eligibility requirements for the Catalog Incentive.

Publications
07/14/2026
FAQs
07/14/2026
Marriage Mail Incentive FAQs

Marriage Mail is a form of direct mail in which marketing service companies combine or “marry” advertisements (e.g., coupons or sales notices) from multiple companies into one mail piece to reduce the cost of the mailing for individual advertisers. This type of direct mailing product allows businesses to reach targeted customer segments.

  • 07/13/2026

    USPS APIs Access Control Data Dictionary

    Detailed information on the USPS APIs data elements available through the Informed Visibility Mail Tracking & Reporting (IV-MTR) application for API Access Control.