Release Notes
06/12/2026
PTR2 Release Notes_DD_06_13_26
Announcements
06/12/2026
DELIVERY - Commercial System Releases (June 20 – June 26)
Announcements
06/12/2026
DELIVERY - NC District Waco Post Office (28169) Temporarily Closed
Announcements
06/12/2026
DELIVERY - South Colton Post Office (13687) - Suspended Temporarily
Announcements
06/12/2026
INFORMATIONAL - USPS Occupancy Trends Product
Announcements
06/12/2026
INFORMATIONAL - USPS Population Mobility Trends Product
Release Notes
06/12/2026
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.

Announcements
06/11/2026
INFORMATIONAL - Upcoming USPS.com Maintenance on July 11, 2026
Release Notes
06/11/2026
USPS APIs Release Notes

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

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06/11/2026
CASS™ Certified Products Guide: Residential Delivery Indicator Cycle O - (Expires July 31, 2028)
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06/11/2026
RDI™ Cycle O: Certified Products Guide (D) - (Expires July 31, 2028)

This document outlines the CASS/MASS certified vendors list for RDI™ Cycle O.

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06/11/2026
CASS™ Certified Products Guide: M L O C R Mailers/Users Data File Cycle O - (Expires July 31, 2028)
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06/11/2026
CASS™ Certified Products Guide: M L O C R Mailers/Users Cycle O - (Expires July 31, 2028)
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06/11/2026
CASS™ Certified Products Guide: M L O C R Service Bureaus Data File Cycle O - (Expires July 31, 2028)
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06/11/2026
CASS™ Certified Products Guide: M L O C R Service Bureaus Cycle O - (Expires July 31, 2028)
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06/11/2026
CASS™ Certified Products Guide: M L O C R Hardware Manufacturers Data File Cycle O - (Expires July 31, 2028)
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06/11/2026
CASS™ Certified Products Guide: M L O C R Hardware Manufacturers Cycle O - (Expires July 31, 2028)
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06/11/2026
CASS™ Certified Products Guide: Z4CHANGE Data File Cycle O - (Expires July 31, 2028)
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06/11/2026
CASS™ Certified Products Guide: Z4CHANGE Cycle O - (Expires July 31, 2028)
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06/11/2026
CASS™ Certified Products Guide: Vendor/Service Licensees Data File Cycle O - (Expires July 31, 2028)
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06/11/2026
CASS™ Certified Products Guide: Vendor/Service Bureaus Licensees Cycle O - (Expires July 31, 2028)
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06/11/2026
CASS™ Certified Products Guide: DSF2® Licensees Data File Cycle O - (Expires July 31, 2028)
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06/11/2026
DSF2® Licensees Cycle O: Certified Products Guide - (Expires July 31, 2028)
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06/11/2026
DPV® Licensees Data File Cycle O: Certified Products Guide (D) - (Expires July 31, 2028)
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06/11/2026
DPV® Licensees Cycle O: Certified Products Guide - (Expires July 31, 2028)