USPS Address Validator
Validate any U.S. mailing address against the USPS database. Get the standardized address format with ZIP+4 codes to ensure your mail reaches its destination.
Why Address Validation Matters
We built this tool so people can check that they have the correct address before sending mail. Sometimes a small variation in an address can cause a delivery delay or even result in returned mail. Millions of mailpieces are returned every year because of incorrect addresses, and a quick address validation can help your mail reach its destination on the first try.
Frequently Asked Questions
Why should I validate my address before mailing?
Validating your address ensures your mail reaches its destination without delays or returns. Invalid or incomplete addresses cause mail to be returned to sender, which can cost you time and money. USPS processes billions of pieces of mail annually, and proper address formatting helps ensure reliable delivery.
What does the address validator check?
The validator checks if the address exists in the USPS database, verifies the street name and number are valid, confirms the city/state/ZIP combination is correct, and provides the standardized USPS format including the ZIP+4 code for more precise delivery.
Why was my address marked as invalid?
Common reasons include: typos in the street name or number, using an outdated street name, wrong city/state/ZIP combination, missing apartment or unit number, using a non-existent address, or formatting issues. Try correcting any typos and ensure all required information is included.