1. A document processing system for processing a plurality of currency bills to be deposited in a financial account of a customer, the currency scanning device comprising: a scanning device having an input receptacle adapted to receive a plurality of currency bills, an image scanner adapted to obtain an image of at least one side of a currency bill and to extract a serial number field from the image, the image scanner being adapted to create an image file containing the image of the currency bill and the serial number field, a transport mechanism adapted to transport each of the plurality of currency bills, one at a time, from the input receptacle past the image scanner, to at least one output receptacle, a controller coupled to the transport mechanism and the image scanner, the controller adapted to control the operation of the transport mechanism and the operation of the image scanner, an evaluation unit adapted to determine the denomination of each of the currency bills, the evaluation unit being coupled to the controller, and a memory communicatively coupled to the controller, the memory having stored therein at least one serial number associated with counterfeit currency bills, wherein the controller is adapted to retrieve the at least one serial number from the memory and to compare extracted serial numbers to the at least one stored serial number, wherein the scanning device is adapted to reject any currency bills having a serial number matching a serial number in the database.