1. A computer-implemented method of processing a substitute check which has been made from an original check, the computer-implemented method comprising: (a) reading from the substitute check a printed magnetic ink character recognition (MICR) codeline; (b) reading from the substitute check an imaged MICR codeline; and (c) comparing the printed MICR codeline of step (a) and the imaged MICR codeline of step (b) to determine if the printed MICR codeline and the imaged MICR codeline match.