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| Ancillary Service Endorsements |
Undeliverable-as-addressed (UAA) mail is forwarded, returned to sender, or treated as dead mail depending upon authorization for the particular mail class. An ancillary service endorsement is used to instruct the Postal Service regarding the mailpiece's appropriate disposition upon determining that it is UAA. To see a description of each endorsement, click on the class of mail you will be using.
Standard Mail Endorsements
First Class Mail Endorsements
Location of Endorsements
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