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Address Verification API Best Practices

An address validation API must have a standard output to prevent any ambiguities or surprises. It should be able to handle large lists and return the data in a format that's easy to sort. Most of the time, these APIs will export the data to a spreadsheet. In addition, it should be as plug and play as possible. Here are some address verification API best practices to follow. These will help you create a good API.



Address verification is a crucial part of KYC/AML checks, and businesses must verify all addresses to reduce the risk of fraud and perform due diligence. Address verification APIs from companies like Cognito are designed to validate and normalize customer addresses to USPS standards. The company's solution can validate customer addresses in real time, and pulls from reliable data sources to make incomplete data usable. By using structured data, the resulting data can be merged with other data sources to provide more accurate and reliable address information.


Address data changes frequently. To be sure, use a reliable address verification API with an address validation database. USPS addresses are subject to rigorous testing to ensure accuracy. Address validation APIs should be CASS certified. These APIs can be installed at the point where contact data is collected or on the server. They can also be integrated into a mobile app to prevent address errors. The USPS website has a comprehensive list of CASS-certified address services.


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