Return Service Requested (RSR) directs USPS to return undeliverable mail to you with the new address or the reason for nondelivery - so you can update your list.
Return Service Requested
Updated 2026-07-24
Return endorsement
Addressing & Lists
Definition reviewed 2026-07-24. Plavidian reference, written from the USPS Domestic Mail Manual. Final mail classification, postage, and preparation are confirmed after list processing and production review.
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Ask Plavidian™ for an answer grounded in the USPS Domestic Mail Manual, or send us the job and we will confirm the preparation before you print.