Release Notes
11/04/2026
November 15 2026 USPS Ship 31.0.0.0 Release Notes

Coming soon

Release Notes
11/04/2026
November 15 2026 PostalOne! 64.1.3.0 Release Notes

Coming soon

Release Notes
11/03/2026
PTR2 Release Notes_DD_11_05_26
Release Notes
11/03/2026
USPS APIs Release Notes

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

Release Notes
10/30/2026
November 12 2026 COP 2.5.9 Release Notes

Coming soon

Release Notes
10/27/2026
PTR1 Maintenance Notes_DD_10_31_26
Release Notes
10/24/2026
Informed Delivery API Release Notes V1.0.3
Release Notes
10/23/2026
November 1 2026 Program Registration 31.4.0.0 Pre-Release Notes
Release Notes
10/23/2026
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.

Release Notes
10/20/2026
PTR2 Release Notes_DD_10_24_26
Release Notes
10/19/2026
October 25 2026 EPS 8.8.0.0 Release Notes
Release Notes
10/19/2026
October 18 2026 PO! 64.1.2.0 Release Notes
Release Notes
10/16/2026
PTR1 Release Notes_DD_10_17_26
Release Notes
10/14/2026
EU Customs Change Release Overview
Release Notes
10/13/2026
October 11 2026 EPS 8.7.2.0 Release Notes
Release Notes
10/07/2026
PTR2 Release Notes_DD_10_13_26
Release Notes
10/05/2026
Bulk Rates API Release Overview
Release Notes
10/04/2026
October 4 2026 - PO! and ProgReg - Release Notes
Release Notes
09/29/2026
January 2027 Release Overview
Release Notes
09/25/2026
September 24, 2026 COP Release 2.5.6
Release Notes
09/20/2026
September 20 2026 Time Limited Price Change (TLPC) 2026 [October] Release Notes
Release Notes
09/14/2026
September 20, 2026 - FAST R69.0.1.0 Release Notes
Release Notes
09/10/2026
PTR2 Release Notes_DD_09_12_26
Release Notes
09/04/2026
Enterprise Payment System (EPS) Release Notes-September 13, 2026
Release Notes
08/28/2026
October 2026 - Timelimited Price Change Release Overview