The Address Correction Result (ACR) code specifies which address fields have been matched or changed during postal matching or searching for a single input contact. There are two forms of ACR code - the extended ACR, which details the status of all address component fields, and the standard ACR, which details the status of a subset of address component fields.
Both extended and standard ACR codes contain three segments:
Extended and standard ACR codes vary only in the component status segment.