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
04/03/2026
USPS APIs Release Notes

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

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 25 2026 Release Notes
Release Notes
03/25/2026
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
03/20/2026
May 3 2026 Release Notes
Release Notes
03/20/2026
March 29 2026 FAST Release Notes