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Home > About USPS & News > Forms & Publications > Postal Periodicals and Publications > Publications > Publication 8A - Address Change Service - Traditional > Introduction
Delivery information is only as good as the quality of the address data. The
Postal Service™ aims to help customers send their mail to the correct
address each and every time. To meet this objective, as stated in its
Transformation Plan, the Postal Service will work with customers to make
sure that databases are updated frequently and accurately.
This document contains details of the Address Change Service - Traditional
method, its technical information, and applications necessary for system
participation. Customers have the choice of selecting one of the two methods
available to participate in this service. The first is the traditional method of
using an all alpha address change service (ACS) participant code
(Publication 8A). The second method is using a mailer ID (MID) code
(Publication 8B) in a 4-state barcode.
All Address Change Service (ACS) mail must contain a valid domestic return
address.
If any discrepancy exists between this document (Publication 8A) and the
Mailing Standards of the United States Postal Service, Domestic Mail Manual
(DMM®), the DMM always takes precedence. For the most current DMM go
to the Postal Explorer Web site (http://pe.usps.gov) and click on Domestic
Mail Manual. Any regulation in this manual can be amended or rescinded by
notices in the Postal Bulletin, Federal Register, or the DMM. If you need
further information, refer to the DMM, call the National Customer Support
Center, ACS Department, at 800-331-5746, or see www.usps.com/ncsc.
From that page, click on Address Management Service, then Move Updates,
then Address Change Service.
It is important to note that the approval of ACS participant and keyline
codes is for placement and content only. It does not imply the mailpiece
meets any readability requirements. Mailpiece readability must be
approved by your local USPS mailpiece design specialist.
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