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Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Development Tracker
This document provides a list of active IV-MTR work to be as well as items completed in the current fiscal year.
*Please note, Postal Pro is the only source for a current IV-MTR Development log as updates will be made on an ongoing basis.
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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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CASS™/MASS™ Certified Products Guide - All Sections Data Files Cycle O - (Expires July 31, 2028)
This document contains the certified vendors list for CASS™ and MASS™ products for Cycle O.
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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.
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NCOALink® Limited Service Provider Licensees
This document provides a list of service providers and contact information for NCOALink®. These providers receive 18 months of change-of-address (COA) data on a weekly basis from the USPS®. For the full 48 months of COA data refer to the NCOALink Full Service Provider Licensees.
09/10/2026
Z4 Info File
A downloadable ZIP file containing information related to the Z4 Info File