Your mailing list is only as good as the data it contains. Outdated, inaccurate, or duplicate addresses don't just waste your marketing budget—they damage your sender reputation, reduce response rates, and cause you to miss out on valuable USPS postage discounts. At Mail Movers, we specialize in professional mailing list cleaning and data hygiene services that ensure your message reaches real people at real addresses.
Whether you're working with a purchased list, your own customer database, or a combination of both, our advanced data processing tools will scrub, verify, and enhance your list to maximize deliverability and ROI. We handle everything from NCOA processing to duplicate removal, giving you a clean, mail-ready list that qualifies for the lowest possible postage rates.
Why List Cleaning is Essential
Save Money on Postage
Eliminate undeliverable addresses and qualify for USPS automation discounts of up to 10%.
Improve Response Rates
Clean data means your mail reaches real people who can actually respond to your offer.
Protect Your Reputation
High bounce rates damage your sender reputation. Clean lists keep you in good standing with USPS.
Maintain Data Accuracy
People move, businesses close, and data degrades. Regular cleaning keeps your database current.
Our Comprehensive List Cleaning Services
NCOALink® Processing
The National Change of Address (NCOA) database contains over 160 million permanent change-of-address records filed with the USPS. We run your list through this database to update addresses for customers who have moved in the past 48 months.
- Updates addresses for people who have moved
- Required for automation postage discounts
- Improves deliverability by 5-15%
CASS™ Certification
Coding Accuracy Support System (CASS) certification verifies that every address on your list matches USPS formatting standards. This process standardizes addresses, adds ZIP+4 codes, and validates deliverability.
- Standardizes address formatting
- Adds ZIP+4 codes for automation discounts
- Identifies undeliverable addresses
DPV® Verification
Delivery Point Validation (DPV) confirms that an address is a real, deliverable location recognized by the USPS. This is the highest level of address verification available.
- Confirms address exists and is deliverable
- Identifies vacant addresses
- Prevents wasted mail to non-existent locations
Duplicate Removal (Merge/Purge)
Sending multiple pieces to the same address wastes money and annoys recipients. Our merge/purge process identifies and removes duplicate records based on name, address, or household.
- Eliminates duplicate names and addresses
- Household-level deduplication available
- Reduces mailing costs and improves customer experience
Suppression List Processing
Remove individuals who have requested not to receive mail, including deceased individuals, prison inmates, and DMA Mail Preference Service opt-outs.
- Deceased suppression
- Prison suppression
- DMA Mail Preference Service opt-outs
Our List Cleaning Process
Submit Your List
Send us your mailing list in any common format (Excel, CSV, database export)
We Process & Clean
We run your list through NCOA, CASS, DPV, and duplicate removal
Review Results
We provide a detailed report showing what was updated, removed, or flagged
Receive Clean List
Get your cleaned, mail-ready list back in your preferred format
What Our Customers Say
"My mailings always go out quickly and Lori is always so nice when I drop off the letters."
Morgan Stanley
Morgan Stanley
"Very professional and courteous. Shawn quickly responds to our request."
City of Rehoboth Beach
City of Rehoboth Beach
"I wish all our vendors were as professional, accommodating and produced exceptional work product in a timely fashion like Mail Movers. Shawn and Tom are all-stars in the printing business."
Correctional Officers Association of Delaware
Correctional Officers Assoc. of DE
Frequently Asked Questions About List Cleaning
Ready to Clean Your Mailing List?
Stop wasting money on undeliverable mail. Let our data experts clean and verify your list to maximize deliverability and postage savings.