October 15 2026 COP 2.5.9 Release Notes

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.

PTR2 Release Notes_DD_10_13_26

Bulk Rates API Release Overview

October 4 2026 - PO! and ProgReg - Release Notes

USPS APIs Release Notes

For the latest updates, please review the USPS APIs Release Notes.

January 2027 Release Overview

September 24, 2026 COP Release 2.5.6

September 20 2026 Time Limited Price Change (TLPC) 2026 [October] Release Notes

September 20, 2026 - FAST R69.0.1.0 Release Notes

PTR2 Release Notes_DD_09_12_26

Enterprise Payment System (EPS) Release Notes-September 13, 2026

October 2026 - Timelimited Price Change Release Overview

PTR2 Release Notes_DD_08_27_26

August 27, 2026 COP Release Notes

August 30 2026 FAST Release Notes

Enterprise Payment System (EPS) Release Notes-August 30, 2026

On Sunday, August 30, 2026, the United States Postal Service will implement the following software change:
• Enterprise Payment System (EPS) 8.7.0.0
These Pre-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; any element of its contents is subject to change prior to the release.

PTR2 Release Notes_DD_08_22_26

August 9, 2026 Program Registration R31.1.0.0 Release Notes

August 9, 2026 eSAS R47.2.0.0 Release Notes

August 16, 2026 PostalOne! and USPS Ship Release

PTR2 Release Notes_DD_08_08_26

PTR2 Release Notes_DD_09_08_26

August 9, 2026 - Electronic Shortpaid Assessment System (eSAS) Release 47.2.0.0

August 9, 2026 - Program Registration Release 31.1.0.0

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.

PTR2 Release Notes_DD_07_25_26

PTR2 Release Notes_DD_07_23_26

PTR2 Release Notes_DD_07_21_26

July 26 2026 EPS/eBill R8.6.0.0 Release Notes

PTR2 Release Notes_DD_07_16_26

July 17, 2026 Customer Onboarding Portal R2.5.4.0

July 12 2026 Release Notes

PTR2 Release Notes_DD_07_11_26

PTR2 Release Notes_DD_07_01_26

July 2026 Release Notes

PTR2 Release Notes_DD_06_27_26

PTR2 Release Notes_DD_06_22_26

PTR2 Release Notes_DD_06_16_26

PTR2 Release Notes_DD_06_13_26

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. 

June 11 2026 USPS Ship R27.0.3.0 Release Notes

June 4 2026 USPS Ship R27.0.2.0 Release Notes

PTR2 Release Notes_DD_05_30_26

PTR2 Release Notes_DD_05_28_26