07/29/2026
USPS APIs Release Notes
For the latest updates, please review the USPS APIs 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.
07/24/2026
07/24/2026
07/24/2026
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Release Notes
These release notes summarize new features and enhancements implemented in deployments to the IV-MTR application.
07/23/2026
07/20/2026
07/20/2026
07/17/2026
07/16/2026
07/12/2026
07/10/2026
07/09/2026
06/28/2026
06/27/2026
06/18/2026
06/16/2026
06/12/2026
06/12/2026
July 2026 Release Overview
Note: For the latest technical specifications, please see the July 2026 Price Change Release Notes as they are published. Mail.dat and Mail.XML updates required for this release.
06/05/2026
06/04/2026
05/28/2026
05/27/2026
05/27/2026
05/21/2026
05/19/2026
05/18/2026
05/17/2026
05/15/2026
05/13/2026
04/26/2026
04/24/2026
04/24/2026
04/17/2026
04/12/2026
04/09/2026
04/08/2026
04/03/2026
04/03/2026
03/29/2026
03/27/2026
03/27/2026
03/25/2026
03/20/2026
03/20/2026
03/19/2026
03/16/2026
03/12/2026
PFSC Application 2.1 Release Notes 3-12-2026
This document describes the updates and enhancements for the PFSC application released on 3/12/2026 along with information on the new MyPFS feature released on 3/13/2026 as part of the My Products Portal.
03/11/2026
03/11/2026