A system for tracking currency bills (fig. 3a. elements 200, 210, and 212) comprises a currency scanning device. (fig. 3a element 210). The scanning device includes a sensor that retrieves currency identification characteristic information of each bill processed. The currency identification characteristic information permits the unique identification of each bill processed. The system further comprises a customer identification means (fig. 3a element 205) and means for associating each processed bill with the customer depositing the bill. Means for identifying the customer (or customer account) associated with a particular processed bill after the deposit transaction has been completed is also included in the system.