No Such Number (NSN) The return code No Such Number (NSN) indicates that a mail piece was addressed to a…
Vacant (VAC) The return code Vacant (VAC) is used when the USPS determines that a House, apartment, office, or building…
Check out this week’s improvements and fixes including improved automatic field mapping, automatic pass through mapping, updated character limits in our API docs, and more…
Deceased (DEC) The return code Deceased (DEC) is used only when it is known that the addressee is deceased and…
Check out this week’s new features and improvements including improved error handling within the UI, export template types displayed in the file export table, UI theming, export delimiter options and more.
Attempted Not Known (ANK) The return code Attempted Not Known (ANK) indicates that a delivery was attempted, but the recipient…
Limited Holiday Support Hours – 2024 During the dates below, phone and chat support will not be available. All support requests…
We are often asked “Why do I receive returned mail?”. Mail can be returned by the USPS and marked “Not…
CASS Certification Before processing your NCOA update, TrueNCOA must first verify, validate, and perform hygiene on your input records with USPS address…
USPS Address Validation Before processing your NCOA update, TrueNCOA must first perform USPS address verification, validation, and hygiene on your input records…