Address validation confirms that a physical address exists, is deliverable, and conforms to postal standards like USPS CASS certification. It goes beyond formatting: validation checks the address against official postal databases to verify that someone can actually receive mail there.
Why It Matters
Bad addresses cost money in two ways. Direct mail sent to invalid addresses is pure waste. And territory assignments based on incorrect locations put reps in the wrong geography. A database with 15% bad addresses means 15% of your direct mail budget goes in the trash and your territory maps have blind spots.
How Address Validation Works
- Parsing: Break the address into components: street number, street name, unit, city, state, ZIP
- Standardization: Convert abbreviations and formats to USPS Publication 28 standards
- Database lookup: Match against USPS, Royal Mail, or other national postal authority databases
- Deliverability check: Confirm the address is a real delivery point, not just a valid format
- Geocoding: Append latitude/longitude coordinates for mapping and territory assignment
Example
A company runs a direct mail campaign to 10,000 addresses. Before mailing, validation catches 1,200 addresses that are incomplete, outdated, or non-existent. They save $6,000 in postage and printing, and their response rate jumps because every piece actually arrives.
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