What happens to undeliverable mail?

What happens to undeliverable mail?

Almost every mailing list has ghosts. People who’ve moved. Addresses that never existed. Businesses that closed. When mail can't reach its destination, USPS classifies it as undeliverable as addressed (UAA). What happens to that mail depends on the choices you made before the piece ever went to print.

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Why does mail become undeliverable?

The most common culprit? A recipient moved without filing a change of address (COA) with USPS. You might also have entered an address incorrectly, included a unit number that doesn't exist, or have a mailbox that is full or abandoned.

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What actually happens to an undeliverable piece?

Mail class determines the fate of a UAA piece. 

• For First Class mail, if the recipient filed a COA with USPS, the piece gets forwarded to the new address. No COA on file, however, means the mail goes back to the sender at the return address on the piece.
• Marketing Mail works differently. Without a service endorsement printed on the piece, USPS will dispose of it. 
• If a piece has no return address and no deliverable destination, it will either be handled by the local Post Office or sent to the Mail Recovery Center.

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Understanding ancillary service endorsements

USPS ancillary service endorsements are special markings printed on your mail that tell USPS how to handle an undeliverable piece. 

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The four main endorsements are: "Return Service Requested," "Address Service Requested," "Change Service Requested," and "Forwarding Service Requested." Each controls whether your undeliverable piece gets returned, forwarded, or discarded, and whether you receive updated address data. 

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A fifth option, "Do Not Forward," is used for legal or compliance mail where confirming someone still lives at a specific address matters more than the piece reaching them. You can only use one endorsement per piece, so think through your priority before you go to press.

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Avoiding UAA with address validation and verification

Want to head off UAA way before you go to print? Start with address validation and verification. Address validation checks whether an address is real and properly formatted against the USPS database. It happens at the point of data entry or list preparation. 

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Address verification happens closer to send and confirms the address is actively deliverable before anything goes to print. Both work together to keep bad addresses out of your list before they become wasted mail.

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List hygiene is an ongoing process

Some UAA is inevitable, but it doesn’t need to be a blind spot. Keeping on top of list hygiene can significantly reduce it over time. Run regular NCOA checks to catch people who have moved, stay on top of opt-outs, and remove or update addresses that have come back undeliverable. Getting this right means your mail is reaching real people, and that makes every campaign more effective.

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