The present disclosure is directed towards methods and systems for ensuring integrity of biometric data for one or more transactions. A mobile biometric device may acquire biometric information of an individual. A ranging module of a transaction device may determine that a distance between the mobile biometric device and a physical location of a first transaction with the individual is within a predefined value. The transaction device may link, responsive to the determination, the acquired biometric information to the first transaction if the biometric information is acquired within a specific time limit from the distance determination. The transaction device may link the acquired biometric information to a universal biometric record of the individual. A biometric integrity engine may compare information from the first transaction and a second transaction for inconsistency or fraud.
