A check processing apparatus and method acquire and save data verifying the identity of a person using a check, and output this information in an effective manner to prevent improper use of the check. A check scanner 140 images all or part of the presented check C. A photo ID scanner 110 scans personal identification 71 presented as proof of identity by the person using the check, and a controller 160 converts the scanner output to generate personal identification image data. A merge file generating means 170 merges the image data from the check scanner with the personal identification image data to produce a merged file. The merged file is stored in merged file storage means 180 and output to a display 33.