Less returned mail? Better business performance? Happier customers? With online address validation, you get it all. By validating your customers' information in real time, you can ensure that only deliverable addresses enter your database. How? Our address validation web service uses the latest U.S. Postal Service® (USPS) data to validate addresses captured through web forms. Try it for yourself! Just fill out the form below and click submit. For international addresses, check out this demo.