A batch of bills is received, transported, and imaged to produce image data. The image data is reproducible as a visually readable image of at least a portion of each of the plurality of currency bills. Each currency bill includes a respective serial number. The serial numbers are extracted from the image data for each of the currency bills. Each extracted serial number is compared with a plurality of serial numbers in a currency bill database to determine if a currency bill associated with an extracted serial number is a suspect currency bill. One of the plurality of currency bills is determined to be a suspect currency bill based on the comparing. In response to determining the suspect currency bill, at least a portion of the produced image data is displayed as a visually readable image of the suspect currency bill on a display unit of the document processing system.