Release Notes
02/18/2026
February 25 2026 Release Notes
Release Notes
02/17/2026
February 26 2026 Release Notes
Release Notes
02/13/2026
February 22 2026 Release Notes
Release Notes
02/12/2026
02_12_26_PTR2 Release Notes
Release Notes
02/11/2026
Tracking API Access Control Changes Release Overview
Release Notes
02/06/2026
Informed Delivery API Release Notes V1.2
Release Notes
02/03/2026
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
02/01/2026
February 1 2026 Release Notes
Release Notes
01/29/2026
USPS APIs Release Notes

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

Release Notes
01/27/2026
01_27_26_PTR2 Release Notes