US Verification API allows you to programmatically verify an address’s deliverability based on USPS's Coding Accuracy Support System (CASS). You can verify addresses through setting Verify checkbox true on records, or pushing
Verifybutton, or using our Address Central.
Required fields: Line 1, City, State, and Postal Code
Required fields: Line 1, and Country
Expected If the address is recognized as a legitimate address, Verified checkbox is trues, Verification ID (External) and Deliverability fields get populated on the address blocks. Also the address format changes to a standardized version.
Failed If address is not recognized, Verified checkbox is false, Verification ID (External) and Deliverability fields remain empty. Verification Errors field shows details.
Badges appear on the Address Central showing the result of address verification.
Not Verified— The address isn't verified yet
Verification Error— The address can't be verified due to an error.
Deliverable— The address is deliverable by the USPS.
Missing Unit— The address is deliverable to the building's default address but is missing secondary unit information. There is a chance the mail will not reach the intended recipient.
Unnecessary Unit— The address is deliverable, but the secondary unit information is unnecessary.
Incorrect Unit— The address is deliverable to the building's default address but the secondary unit provided may not exist. There is a chance the mail will not reach the intended recipient.
Undeliverable— The address is not deliverable according to the USPS.