Address Cleansing
Understand the landscape of clean address data.
A clear map of how address data gets fixed, verified, and put to work.
The landscape
Address cleansing is a map of related practices—not a single product.
Teams often mix up validation with verification, or treat geocoding as a substitute for postal accuracy. Start here to see how the pieces fit before you buy tools or write pipelines.
Topics
Choose a path into the subject
- 01Address validationCheck whether an address is structurally complete and plausible before you treat it as deliverable.
- 02Address verificationConfirm that an address exists in authoritative reference data and can typically receive mail or deliveries.
- 03Standardization & formattingRewrite addresses into a consistent, preferred format so systems can compare, store, and print them reliably.
- 04GeocodingTurn an address into coordinates (and often a precision level) so maps, routing, and spatial analysis can use it.
- 05CASS certificationUSPS Coding Accuracy Support System—software certification and a process that improves ZIP+4 and delivery-point accuracy for US mail.
- 06NCOA — National Change of AddressUSPS-licensed process that updates addresses when people and businesses file official change-of-address moves.
- 07Deduplication & matchingFind and merge records that refer to the same place or household despite messy spelling and formatting differences.
Who this is for
Operators who inherited messy address data—and need a place to begin.
If you ship products, mail statements, run a CRM, underwrite risk, or design territories, addresses are load-bearing. This site explains the vocabulary and the sequence of practices without pitching a vendor.
When you are ready to act, the getting started guide walks through a practical order of operations.