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Release Notes
04/16/2026

USPS APIs Release Notes

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

Release Notes
04/14/2026

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
04/13/2026

PTR2 Release Notes_DD_04_18_26

Release Notes
04/09/2026

PTR2 Release Notes_DD_04_07_26

Release Notes
04/08/2026

April 12 2026 Time Limited Price Change (TLPC) 2026 Release Overview

Release Notes
04/03/2026

April 12 2026 Time Limited Price Change (TLPC) 2026 Release Notes

Release Notes
04/03/2026

PTR2 Release Notes_DD_04_02_26

Release Notes
04/03/2026

PTR2 Release Notes_DD_04_04_26

Release Notes
03/29/2026

March 29 2026 PostalOne! Release Notes

Release Notes
03/27/2026

PTR2 Release Notes_DD_03_27_26

Release Notes
03/27/2026

PTR2 Release Notes_DD_03_29_26

Release Notes
03/25/2026

March 29 2026 FAST Release Notes

Release Notes
03/19/2026

PTR2 Release Notes_DD_03_21_26

Release Notes
03/19/2026

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
03/16/2026

PTR2 Release Notes_DD_03_12_26

Release Notes
03/12/2026

PFSC Application 2.1 Release Notes 3-12-2026

This document describes the updates and enhancements for the PFSC application released on 3/12/2026 along with information on the new MyPFS feature released on 3/13/2026 as part of the My Products Portal.

Release Notes
03/11/2026