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.

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.

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.

Appendix E: ACS™ File Format Change History

Appendix C: ACS™ Product Code Information and Details

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

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.