What is NCOA processing?
Last updated July 20, 2026
NCOA processing is the practice of matching a mailing list against the USPS National Change of Address database — the registry of change-of-address requests filed by people and businesses that move — and updating the list with new addresses before mailing. It is performed through USPS-licensed providers under the NCOALink program and is a standard step in preparing commercial mail.
Key takeaways
- NCOA matches list records by name and old address against filed USPS change-of-address requests, returning updated addresses or move flags.
- USPS's Move Update standard requires commercial mailers claiming discounted rates to update addresses through an approved method, and NCOA is the most common.
- NCOA data covers moves filed within roughly the past 48 months, depending on the service level used.
- Its blind spot for B2B is structural: job changes and many office relocations are never filed with USPS, so NCOA alone can't keep a B2B list accurate.
How NCOA processing works
When someone moves and files a change-of-address request with USPS, that filing enters the National Change of Address database. NCOA processing submits a mailing list to a USPS-licensed provider, which matches each record — name plus old address — against those filings. Matched records come back with the new address or a move indicator; the mailer updates the list before printing. Depending on the service level, the data reaches back up to roughly 48 months of filed moves.
Why NCOA processing matters
The first benefit is direct: fewer pieces mailed to addresses the recipient has left, which means less wasted print and postage and fewer undeliverable returns. The second is regulatory. USPS's Move Update standard requires mailers claiming presorted or automation discounts to have updated their addresses through an approved method within a set window before mailing — so for high-volume commercial mailers, NCOA processing is effectively part of the price of discounted postage, not just good practice.
NCOA's limits for B2B mail
NCOA can only report moves someone told USPS about, and B2B address decay mostly happens outside that system. A person who changes employers files nothing — their old company still stands, so there is no move to record. Many business relocations, suite changes within a building, and office consolidations also go unfiled. The result: a B2B list can pass NCOA processing cleanly and still be full of contacts who no longer sit anywhere near the address on file.
That is why physical outbound treats NCOA as one hygiene input rather than the answer. Services built for contact-level mail — B2BMail among them — verify each named person's current business address before printing, catching exactly the job-change and office-move failures NCOA structurally cannot see.
Frequently asked questions
Is NCOA processing required?
It is not required for mail sent at full single-piece rates. But mailers claiming USPS presorted or automation discounts must comply with the Move Update standard, which requires addresses to be updated through an approved method — NCOA processing being the most widely used — within a set period before mailing. For commercial mail at scale, it is effectively mandatory.
How far back does NCOA data go?
NCOALink data covers change-of-address requests filed within roughly the past 48 months at the full service level; a limited service level covers a shorter window. Moves older than the data window, and moves never filed with USPS at all, are invisible to NCOA processing regardless of service level.
Does NCOA catch people who changed jobs?
No. NCOA records address changes filed with USPS, and a job change involves no such filing — the former employer remains at its address, and the person's new employer was never linked to them in postal data. This is the core reason NCOA-cleaned B2B lists still mail to desks people left; catching job changes requires contact-level verification from employment data, not postal data.
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