Release Notes
06/27/2026
PTR2 Release Notes_DD_06_27_26
Release Notes
06/26/2026
USPS APIs Release Notes

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

Release Notes
06/25/2026
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
06/23/2026
July 2026 Release Notes
Release Notes
06/18/2026
PTR2 Release Notes_DD_06_22_26
Release Notes
06/16/2026
PTR2 Release Notes_DD_06_16_26
Release Notes
06/12/2026
PTR2 Release Notes_DD_06_13_26
Release Notes
06/05/2026
June 11 2026 USPS Ship R27.0.3.0 Release Notes
Release Notes
06/04/2026
June 4 2026 USPS Ship R27.0.2.0 Release Notes
Release Notes
05/28/2026
PTR2 Release Notes_DD_05_30_26
Release Notes
05/27/2026
PTR2 Release Notes_DD_05_28_26
Release Notes
05/27/2026
PTR2 Release Notes_DD_05_26_26
Release Notes
05/21/2026
PTR2 Release Notes_DD_05_21_26
Release Notes
05/20/2026
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. 

Release Notes
05/19/2026
PTR2 Release Notes_DD_05_19_26
Release Notes
05/18/2026
May 31 2026 EPS/eBill R8.4.0.0 Release Notes
Release Notes
05/17/2026
May 17 2026 PostalOne! R63.2.2.0; Crosswalk R10.0.1.0 & USPS Ship R27.0.0.0 Release Notes
Release Notes
05/15/2026
May 27 2026 USPS Ship R27.0.1.0 Release Notes
Release Notes
05/13/2026
PTR2 Release Notes_DD_05_14_26
Release Notes
04/26/2026
April 26 2026 FAST R67.0.3.0 Release Notes
Release Notes
04/24/2026
April 26 2026 PostalOne! R63.2.1.0 Release Notes
Release Notes
04/24/2026
PTR2 Release Notes_DD_04_23_26
Release Notes
04/17/2026
PTR2 Release Notes_DD_04_18_26
Release Notes
04/12/2026
April 12 2026 Time Limited Price Change (TLPC) 2026 Release Notes
Release Notes
04/09/2026
PTR2 Release Notes_DD_04_07_26