Quick Service Guides
Steps to Create the Intelligent Mail® Barcode

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

Tools
Barcode Decoder/Encoder

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

User Guides
01/22/2023
Address Element Correction (AEC) & AEC II User Guide

A comprehensive user guide to Address Element Correction (AEC) and AEC II®. Topics addressed: the importance of address accuracy, differences between AEC I and II, ACS vs.

Applications/ Forms
12/01/2022
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.

Fact Sheets
10/24/2022
Service Type Identifier (STID) Table Effective January 23, 2022

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.

Publications
08/09/2022
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.

FAQs
05/03/2022
Intelligent Mail® Barcode FAQ

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

Publications
05/02/2022
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.

Quick Service Guides
05/11/2021
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™).

Applications/ Forms
02/01/2021
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.

User Guides
01/30/2020
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.

Tech Guides
10/18/2019
Traditional ACS™ with Shipper Paid Services Technical Guide

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

Tech Guides
10/18/2019
Traditional ACS™ with Shipper Paid Services Technical Guide

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

Tech Guides
10/18/2019
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.

Tech Guides
10/18/2019
OneCode ACS® Technical Guide

This guide provides technical references for OneCode ACS®.

Tech Guides
10/18/2019
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.

Tech Guides
10/18/2019
ACS™ File Format Technical Guide

This document contains the technical guide for ACS file format.

Tech Guides
10/18/2019
OneCode ACS® Technical Guide

This guide provides technical references for OneCode ACS®.

Tools
07/30/2019
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.

Applications/ Forms
03/15/2019
ACS™ Enrollment Form

Enrollment form for ACS™.

Applications/ Forms
03/15/2019
ACS™ Enrollment Form

Enrollment form for ACS™.

Publications
07/25/2018
Appendix C: ACS™ Product Code Information and Details

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

User Guides
09/18/2017
ACS™ Product Information Guide: Publication 8

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

FAQs
09/26/2016
Move Update Compliance for Non-U.S. Mailers FAQs

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

Fact Sheets
07/01/2016
Clarification to the Move Update Standard

This document contains information on the Move Update standards.

Publications
03/07/2016
Domestic Mail Manual (DMM®) 507.4.2: ACS™

This document provides information on Address Change Service (ACS).

Publications
03/07/2016
Domestic Mail Manual (DMM®) 602: Addressing

This document provides information on Addressing.

User Guides
05/26/2015
ACS™ Electronic Product Fulfillment (EPF) File Access

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

Tech Guides
05/26/2015
ACS™ Electronic Product Fulfillment (EPF) Fulfillment File Access

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

Announcements
04/28/2015
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.

Tech Guides
04/20/2015
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.

Data Files
01/16/2015
ACS™ File Format Sample File

Sample file formats for ACS™.

Tech Guides
10/21/2014
ACS™ Electronic Product Fulfillment (EPF) Download Manager Technical Guide

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

Presentations
03/15/2014
Postal Customer Council (PCC) Workshop: NCOA vs. ACS™: Which is Best?

This presentation provides a comparison of both NCOA and ACS.

Announcements
03/14/2014
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.

Publications
07/28/2013
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).

Publications
07/28/2013
Appendix D: Glossary of ACS™ Acronyms and Terminology

This document contains a glossary of ACS™ terms.

FAQs
01/01/2013
ACS™ Announcement: Traditional ACS™ Service Type ID FAQ

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

Tools
01/02/2012
Traditional ACS™ Keyline Utility

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

Fact Sheets
03/16/2010
Intelligent Mail® Barcode (IMb) Resources

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

Announcements
10/14/2009
ACS™ Announcement: ACS™ Fulfillment for Wednesday October 14, 2009

ACS fulfillments for Wednesday morning October 14 will be delayed.

Announcements
10/09/2009
ACS™ Announcement: ACS™ Fulfillment for Saturday, Sunday and Monday October 10 - 12, 2009

ACS customers who are expecting ACS fulfillments on Saturday, Sunday and Monday October 10 - 12, 2009 may not receive all of the records available for fulfillment.

Announcements
10/07/2009
ACS™ Announcement: ACS™ Fulfillment for Wednesday October 7, 2009 & Thursday October 8, 2009

The ACS fulfillment for Wednesday October 7, 2009 and October 8, 2009 did not contain all of the records available for fulfillment.

Announcements
09/29/2009
ACS™ Announcement: ACS™ Fulfillment for Saturday September 26, 2009

The ACS fulfillment for Saturday September 26, 2009 did not contain all of the records available for fulfillment.

Tools
05/08/2009
Traditional ACS™ MOD 10 Keyline Utility with Microsoft Excel®

ACS™ MOD 10 Keyline Utility utilizing Microsoft Excel®

Announcements
02/16/2009
ACS™ Announcement: OneCode ACS® Fulfillment

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

User Guides
01/01/2009
Intelligent Mail® Barcode Technical Resource Guide

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

Announcements
12/05/2008
ACS™ Announcement: Daily Fulfillment for OneCode ACS® December 5, 2008

OneCode ACS® Fulfillment will change to a daily fulfillment.

Announcements
09/29/2008
Announcements
08/03/2008
Announcements
04/18/2008
Fact Sheets
02/04/2008
Intelligent Mail® Barcode Resources

This document provides additional information and resources on IMb.