A positive confirmation is an inquiry made by an auditor to a third party that requires a response. The inquiry is in regard to whether the third party's records match those that the auditor is examining. Even if there is a match, with no exceptions, the auditor still requests a response. The other type of confirmation is a negative confirmation, where the third party only has to respond if there is a discrepancy between the records.
A positive confirmation is considered to represent a higher quality of evidence than a negative confirmation, since the auditor receives explicit evidence from the third party.