Release Notes
02/27/2026
PTR2 Release Notes_DD_02_28_26
Release Notes
02/25/2026
USPS APIs Release Notes

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

Release Notes
02/24/2026
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
02/22/2026
February 22 2026 Release Notes
Release Notes
02/19/2026
PTR2 Release Notes_DD_02_21_26
Release Notes
02/19/2026
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
02/18/2026
February 25 2026 Release Notes
Release Notes
02/17/2026
February 26 2026 Release Notes
Release Notes
02/12/2026
PTR2 Release Notes_DD_02_12_26
Release Notes
02/11/2026
Tracking API Access Control Changes Release Overview