Publication 199 (Effective July 9, 2023): Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems

This is a preview of Publication 199 which will be effective on July 9, 2023. For the current version please click here.

Tech Sheets for APIs, Click-N-Ship, and USPS Ship

Information on USPS offerings to help you streamline your shipping.

July 2023 - Release - FAQ

July 2023 Price Change Release Notes

Mail Dat Client update is mandatory for this Release.

July 2023 Price Change Release Overview

Mail Dat Client update is mandatory for this Release.  

Caller/Reserve Transition to the Enterprise Payment System (EPS)

Effective July 1, 2023, customers without an EPS account will no longer be able to apply for or renew caller and reserve services at the retail counter. 

Certified Full-Service Vendor Detailed List

This document contains a spreadsheet of detailed contact list information for Full-Service vendors.

Parcel Return Service (PRS) Guide

Parcel Return Service is only available through a Negotiated Service Agreement (NSA) (709.1.0). Please consult this guide or contact a USPS Sales Representative for additional details.

2D IMpb Barcode Guide

Some labels on packages may have barcodes that are not able to be scanned while being processed through automated equipment; this could be due to distortion, label placement, movement of items within soft packaging, etc.

Seamless Acceptance Undocumented Mail Fact Sheet

Provides insight into the source of undocumented error reporting, common causes, and best practices.

New Mailing Standards for the Separation of Hazardous Materials

The Postal Service has issued an interim final rule that will become effective upon publication in the Federal Register on June 6, 2022, with new requirements for the separation of hazardous materials (HAZMAT).

Balance Check in the Customer Validation Tool Instructions

When given explicit permission by permit holders to do so, MSPs have the ability to perform balance checks for EPS and Local Trust accounts at the permit level.

Informational Video for Shippers

This video provides helpful information for shippers and includes important USPS parcel shipping requirements.

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.

Industry Connect Dashboard

USPS Post Office & Collection Box Data

Datasets containing the specific coordinates of United States Postal Service Post Offices and blue collection boxes as well as detailed information around specific services offered and hours of operations or collection times.

CRID Management

Customer Registration ID (CRID) Overview.

10 Year Plan to Achieve Financial Sustainability and Service Excellence

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

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.

Z4 Info File

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

CASS™ Certified Products Guide: Z4CHANGE Data File Cycle O - (Expires July 31, 2028)

Publication 199 (Effective July 9, 2023): Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems

This is a preview of Publication 199 which will be effective on July 9, 2023. For the current version please click here.