Steps to Create the Intelligent Mail® Barcode

This document is a quick-reference guide for creating your Intelligent Mail® Barcodes.

Barcode Decoder/Encoder

The IMb encoder and decoder tool allows you to convert Intelligent Mail® barcodes into numeric equivalents, or vice versa.

ACS™ Electronic Product Fulfillment (EPF) Download Manager Technical Guide

Documentation for the Client Side ACS™ EPF Download Manager software package.

Service Type Identifier (STID) Table Effective January 21, 2024

The STID (Service Type Identifier) is a three-digit numeric code used within the Intelligent Mail® barcode (IMb™) on a mailpiece that identifies the address correction or other electronic services desired.

Appendix A: Ancillary Service Type Identifier (STID) Details

Appendix A provides a detailed description of the various address correction options available within basic / Nonautomation and full-service mailings and the STIDs that provide the different undeliverable-as-addressed (UAA) treatments.

Intelligent Mail® Package Barcode (IMpb) ACS™ Technical Guide

Technical guide for users of Intelligent Mail® Package Barcode (IMpb) Address Change Services (ACS). Includes a solution overview, features, participation requirements, and service endorsement options.

Intelligent Mail® Package Barcode (IMpb) ACS™ Technical Guide

Technical guide for users of Intelligent Mail® Package Barcode (IMpb) Address Change Services (ACS). Includes a solution overview, features, participation requirements, and service endorsement options.

Traditional ACS™ with Shipper Paid Services Technical Guide

This document is a guide that provides technical information about Traditional ACS™ with shipper paid services.

Traditional ACS™ with Shipper Paid Services Technical Guide

This document is a guide that provides technical information about Traditional ACS™ with shipper paid services.

Guide to Move Update

The Move Update standard is a means of reducing the number of mailpieces in a mailing that require forwarding or return by the periodic matching of a mailer’s address records with change-of-address orders received and maintained by the Postal Service.

Electronic Product Fulfillment (EPF) Web Access Request Form (PS 5116)

This form is used to create a Web-based account with the Addressing and Geospatial Technology (AGT) office which will be utilized to retrieve/download files from the Electronic Product Fulfillment (EPF) website.

Intelligent Mail® Barcode FAQ

This document includes frequently asked questions (FAQ) and answers for IMb.

Mailer's Technical Advisory Committee - Best Practices for ACS™

This document is designed to enhance mailers' understanding of the US Postal Service's ACS™ product.

Service Type Identifier (STID) Quick Service Guide

This document provides quick information about the STID (Service Type Identifier) - a three-digit numeric code used within the Intelligent Mail® barcode (IMb™).

Mailer Identifier (MID) Application

Complete the following application to request a Mailer Identifier (MID) for use in the Intelligent Mail® container barcode, Intelligent Mail® tray barcode, or Intelligent Mail® barcode.

OneCode ACS® Technical Guide

This guide provides technical references for OneCode ACS®.

ACS™ File Format Technical Guide

This document contains the technical guide for ACS file format.

OneCode ACS® Technical Guide

This guide provides technical references for OneCode ACS®.

ACS™ Electronic Product Fulfillment (EPF) Download Manager Software (Client Side)

Please send an email to ACS@usps.gov requesting the current versions of the EPF download managers and documentation to create your own download manager.

ACS™ Enrollment Form

Enrollment form for ACS™.

ACS™ Enrollment Form

Enrollment form for ACS™.

Appendix C: ACS™ Product Code Information and Details

This document provides ACS™ Product Codes, descriptions, classifications, shapes, and fees.

ACS™ Announcement: ACS SingleSource Full Service Chargeback Process

ACS™ Product Information Guide: Publication 8

A complete overview of Address Change Services: eligibility, benefits, implementation, and technical specifications.

Move Update Compliance for Non-U.S. Mailers FAQs

The U.S. Postal Service® has gathered some common questions asked by foreign mailers.

Clarification to the Move Update Standard

This document contains information on the Move Update standards.

ACS™ Electronic Product Fulfillment (EPF) Fulfillment File Access

Learn the different methods of accessing your ACS™ files from EPF.

ACS™ Electronic Product Fulfillment (EPF) File Access

Instructions for accessing ACS Electronic Product Fulfillment (EPF) files.

ACS™ Announcement: Electronic Product Fulfillment (EPF) Invoice Modification

The ACS EPF Billing Invoice PDF version has been modified effective with the April 24, 2015 invoice.

Intelligent Mail® Barcode (IMb) 4-State Specification

This document provides the specifications for generating and printing the Intelligent Mail® barcode (IMb) used in the U.S. Postal Service (USPS) mailstream.

ACS™ File Format Sample File

Sample file formats for ACS™.

Postal Customer Council (PCC) Workshop: NCOA vs. ACS™: Which is Best?

This presentation provides a comparison of both NCOA and ACS.

ACS™ Announcement: Electronic Product Fulfillment (EPF) Planned Maintenance and Migration Rescheduled

Electronic Product Fulfillment (EPF) maintenance previously planned for March 15, 2014 has been tentatively rescheduled to begin March 22, 2014 at 10am CST and end March 23, 2014 at 10pm CST.

Appendix B: ACS™ Frequently Asked Questions

This document provides frequently asked questions (FAQs) and answers about the Intelligent Mail® Barcode, Traditional ACS™, OneCode ACS™, Full Service ACS™, Single Source ACS™, and the Intelligent Mail® Package Barcode (IMpb).

Appendix D: Glossary of ACS™ Acronyms and Terminology

This document contains a glossary of ACS™ terms.

ACS™ Announcement: Traditional ACS™ Service Type ID FAQ

This document details frequently asked questions regarding the Traditional ACS required change.

Traditional ACS™ Keyline Utility

Traditional Keyline Utility - Enter a keyline, see the check digit.

Intelligent Mail® Barcode (IMb) Resources

This fact sheet provides a listing of Intelligent Mail Barcode resources.

Traditional ACS™ MOD 10 Keyline Utility with Microsoft Excel®

ACS™ MOD 10 Keyline Utility utilizing Microsoft Excel®

ACS™ Announcement: OneCode ACS® Fulfillment

Information regarding OneCode ACS data content regarding the Intelligent Mail (IM) barcode

Intelligent Mail® Barcode Technical Resource Guide

This document contains the technical guide for Intelligent Mail® Barcode.

Intelligent Mail® Barcode Resources

This document provides additional information and resources on IMb.