When you send an MD5, SHA-1, or SHA-256 hashed input to the Lookup Endpoint, the API will return a derived link if it does not find any matches to maintained links. This applies to Abilitec (consumer, address, household), AbilitecBusiness (address), and AbilitecHousehold (household) links. Previously, if the returned document contained no maintained Abilitec links, the API returned an empty response.

We've updated Error Documents to explain what happens to records associated with opted-out users.