If you’ve ever mailed thousands of pieces and ended up with a stack of returns, you know the pain of bad data. According to a white paper from Pitney Bowes, only about 60% of movers actually file a Change of Address (COA) with the USPS. That leaves a massive 40% gap of people who’ve moved but haven’t told the post office, leaving their mail in limbo. For marketers relying on direct mail to deliver critical communications or drive engagement, this is more than an inconvenience – it’s money wasted.
But movers aren’t the only culprit. Hidden duplicates in your list can be just as costly. Slight name variations, inconsistent formatting, and outdated address records can result in the same person receiving two (or more) copies of your mail piece—or worse, nothing at all if conflicting data prevents a clean merge.
How Duplicates Hide in Plain Sight
At first glance, your list might look fine. But dig deeper, and you might find:
- “Jon Smith” and “Jonathan Smith” at the same address
- “Katherine” spelled four different ways with variations of a similar address
- Apartments listed as “Apt 2B,” “Unit 2B,” and “#2B”
- Same person at an old address and a new one
These inconsistencies add up. Multiply them across thousands of records, and you’re looking at inflated print quantities, unnecessary postage, and missed impressions. Worse, in compliance-heavy mailings like data breach notifications, bad data can trigger regulatory issues.
Simple Fixes, Big Impact
So what can marketers do? When you partner with Allied, we use a number of techniques to cleanse your lists, maximize efficiency, and lower costs:
- Run NCOA Before Every Mail Drop
The National Change of Address database helps you catch recent movers who did file a COA. It’s a fast, automated way to clean your list against the most current USPS records. - Use Address Standardization Tools
Make sure all addresses are formatted consistently and match USPS delivery standards. This isn’t just cosmetic! It affects deliverability and helps our software spot duplicates more accurately. - Phonetic and Fuzzy Matching
Basic deduplication compares names and addresses for exact matches. But smarter tools go further by recognizing that “Catherine” and “Katherine” might be the same person. Algorithmic tools can analyze how names sound, not just how they’re spelled. - Implement Weighted Matching Rules
Some records might match on address but differ on first name. Others might match on name but differ slightly in ZIP code. Assign weights to each field (name, address, phone, etc.) and flag records that pass a certain similarity threshold. - Leverage Ancillary Endorsements for Smarter Feedback
Don’t just send mail—learn from it. USPS ancillary endorsements like “Address Service Requested” provide insight when mail can’t be delivered, helping you pinpoint address issues and keep your data sharp. It’s a valuable feedback loop that turns every mailing into an opportunity for improvement.
(Curious how you can receive return mail notifications, even when using standard rate postage? Talk to the Allied mailing experts about how we can set up cost-effective systems to capture undeliverable mail and refine your list over time.)
Clean Data = Efficient, Effective Direct Mail
Direct mail remains one of the most powerful channels in marketing, especially for sensitive, personalized, or regulatory communications. But its effectiveness hinges on data quality. Clean lists reduce waste, lower postage costs, and improve your ROI.
If you’re mailing 50,000 letters, even a 5% rate of duplicates or undeliverables means 2,500 wasted pieces. That’s thousands of dollars in print and postage gone, not to mention thousands of missed opportunities.
Want to win with direct mail? Start with your list.
Allied provides secure, end-to-end direct mail solutions that include NCOA processing, deduplication, and address standardization, plus camera matching and mail tracking to ensure every piece lands where it should. Talk to our team ahead of your next campaign!