Applying for Access to Informed Visibility® Mail Tracking & Reporting (IV®-MTR)

This presentation provides instructions for applying for access to the IV Mail Tracking & Reporting application (IV-MTR). The instructions include how to register for a Business Customer Gateway (BCG) account, add the IV-MTR service in the BCG, and how to sign in to the IV-MTR portal to begin using the service. 

Publication for Streamlined Mail Acceptance for Letters and Flats (Pub 685)

Streamlined Mail Acceptance for Letters and Flats (Pub 685) contains the policies and processes for the verification of eligible business mailings using tools provided by Intelligent Mail® Full-Service, eInduction, and Seamless Acceptance.

DELIVERY: Southern Area - Texas 3 District -Stanton Post Office (79782) - Operations Temporarily Suspended

USPS APIs Release Notes

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

2026 Promotions Calendar and Technical Guide

DELIVERY - Hewitt Post Office (07421) - Temporarily Closed

CASS™ Certified Products Guide: Vendor/Service Bureaus Licensees Cycle O - (Expires July 31, 2028)

Z4 Info File

A downloadable ZIP file containing information related to the Z4 Info File

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.

DPV® Licensees Data File Cycle O: Certified Products Guide (D) - (Expires July 31, 2028)

DPV® Licensees Cycle O: Certified Products Guide - (Expires July 31, 2028)

CASS™ Software Manufacturers Cycle O - (Expires July 31, 2028)