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Ancillary Service Endorsement Fact Sheet
Ancillary service endorsements are used by mailers to request an addressee’s new address or the reason mail cannot be delivered as addressed and to provide the US Postal Service with instructions on how to handle Undeliverable As Addressed (UAA) mailpieces.
03/03/2026
Ancillary Service Endorsement Fact Sheet
Ancillary service endorsements are used by mailers to request an addressee’s new address or the reason mail cannot be delivered as addressed and to provide the US Postal Service with instructions on how to handle Undeliverable As Addressed (UAA) mailpieces.
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ACS™ Enrollment Form
This document is the enrollment form for ACS™.
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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.
07/06/2022
Ancillary Services for Parcel Select and Parcel Select Lightweight FAQs
Frequently Asked Questions for Ancillary Services for Parcel Select and Parcel Select Lightweight
07/06/2022
Ancillary Services for Parcel Select and Parcel Select Lightweight FAQs
Frequently Asked Questions for Ancillary Services for Parcel Select and Parcel Select Lightweight