Mailing List Cleaning in Maryland — Stop Paying for Undeliverable Mail
Every undeliverable piece costs you postage, printing, and opportunity. Mail Movers uses CASS, NCOALink, and DPV processing to clean your list, update mover addresses, and qualify you for USPS automation postage discounts. List cleaning is one of the highest-ROI investments in any direct mail campaign — it costs pennies per record but saves dollars in wasted postage and printing.
What We Do to Clean Your List
- CASS Certification (Coding Accuracy Support System): Standardizes every address to the official USPS format — correcting misspellings, adding ZIP+4, and ensuring each address matches the USPS delivery database. Required for automation postage discounts.
- NCOALink (National Change of Address): Cross-references your list against the USPS database of everyone who has filed a change of address in the last 48 months. Updates old addresses to current ones.
- DPV (Delivery Point Validation): Confirms that each address is a real, deliverable location — not a vacant lot, demolished building, or non-existent apartment number.
- Duplicate Removal: Identifies and removes duplicate records so you don't pay to mail the same person twice.
- Deceased Suppression: Removes records for individuals who are deceased, reducing waste and avoiding insensitive mailings.
Why List Cleaning Matters
The USPS estimates that 15–20% of addresses in a typical mailing list are outdated or incorrect. That means if you mail 5,000 pieces without cleaning your list, 750–1,000 pieces may be undeliverable — wasting $375–$500 in postage alone, plus printing costs. List cleaning typically costs $0.02–$0.05 per record and pays for itself many times over.
When to Clean Your List
- Before every mailing — especially if your list hasn't been updated in 6+ months
- Before purchasing postage — NCOA processing is required for USPS automation rates
- After importing new records from a CRM, event registration, or purchased list
- Annually as a maintenance practice to keep your database current
Free Sample Cleaning
Send us a sample of your mailing list (up to 500 records) and we'll run it through our full CASS/NCOA/DPV process at no charge — so you can see exactly how many addresses need updating before you commit to a full campaign.
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