What is NCOA?
NCOA (NCOALink) matches your list against ~160 million USPS change-of-address records from the last 48 months, so mail reaches people who moved. It's also required to claim bulk postage rates. Here's how it works and why it protects every dollar you mail.
What does NCOA mean in direct mail?
NCOA is the address-hygiene step that catches movers before you mail. Skip it and you pay postage to mail empty houses. Here's the short answer, then the detail.
NCOA (National Change of Address), delivered through the USPS NCOALink product, is a service that matches a mailing list against approximately 160 million permanent change-of-address records filed with the Postal Service over the previous 48 months. Processing a list through NCOA updates the addresses of individuals, families, and businesses who have moved, so mail reaches their current address rather than being forwarded, returned, or discarded. NCOA also satisfies the USPS Move Update standard — required to claim presorted/automation First-Class and USPS Marketing Mail prices — when the list is processed within 95 days before the mailing date. It is run alongside CASS certification as the standard pre-mailing hygiene step.
What NCOA does for a mailing
NCOA is the quiet protector of a campaign budget — it keeps spend off addresses that no longer exist and unlocks the lower postage tiers.
Two reasons NCOA matters
- Deliverability. Roughly 14% of Americans move each year. NCOA updates those records so mail lands instead of bouncing — protecting both spend and response rate.
- Postage eligibility. NCOA satisfies the USPS Move Update standard, which is required to claim presorted/ automation First-Class and all USPS Marketing Mail prices. No Move Update, no discount tier.
How NCOA processing works
- 1. Submit your address list to a USPS-licensed NCOALink provider.
- 2. Each record is matched against the change-of-address database; updated addresses and move flags are returned.
- 3. The list must be processed within 95 days before the mailing date to meet the Move Update standard.
- 4. NCOA is typically run with CASS and presort as one hygiene-and-prep step before print.
NCOA vs. CASS
These are complementary, not interchangeable. A clean list needs both.
| CASS | NCOA | |
|---|---|---|
| What it does | Standardizes & validates the address format | Updates the address when someone has moved |
| Fixes | Wrong ZIP+4, bad abbreviations, undeliverable format | Outdated address after a move |
| Unlocks | Automation postage (machine-readable) | Move Update compliance for bulk rates |
Source: USPS PostalPro (Move Update, NCOALink). CASS makes the address machine-readable; NCOA makes sure it's the right address.
Questions mailers ask about NCOA.
Straight, source-backed answers on what NCOA is, why it's required, and how it differs from CASS.
What is NCOA?
NCOA (NCOALink) is a USPS-licensed service that matches your mailing list against approximately 160 million permanent change-of-address records filed with the Postal Service over the past 48 months. Running your list through NCOA updates the addresses of people and businesses who have moved, so your mail reaches them at their current address instead of being returned or thrown away.
Why is NCOA important for direct mail?
Two reasons: deliverability and cost. Roughly 14% of Americans move each year, so an un-updated list quietly accumulates dead addresses you still pay postage to mail. NCOA also satisfies the USPS Move Update standard, which is required to claim presorted/automation First-Class and all USPS Marketing Mail prices — skip it and you lose access to the lower postage tiers.
How does NCOA processing work?
You submit your address list to a USPS-licensed NCOALink provider, which matches each record against the change-of-address database and returns updated addresses plus move flags. To meet the Move Update standard, the list must be processed within 95 days before the mailing date. NCOA is typically run together with CASS certification as one hygiene step before a mailing goes to print.
What's the difference between NCOA and CASS?
They solve different problems. CASS (Coding Accuracy Support System) standardizes and validates an address to the exact format USPS automation equipment requires — correct ZIP+4, abbreviations, and delivery point. NCOA updates the address when the person or business has moved. A clean list needs both: CASS makes the address machine-readable; NCOA makes sure it's the right address.
Is NCOA required to send direct mail?
It isn't required for single-piece retail mail, but it is required — via the USPS Move Update standard — to claim presorted or automation First-Class prices and all USPS Marketing Mail prices. Practically, any bulk mailer runs NCOA both to qualify for discounted postage and to avoid wasting spend on undeliverable pieces. DirectMail.io builds NCOA and CASS into the production workflow so every list is processed before it mails.
Stop paying postage on addresses that moved.
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