1. A process for reading an optical code comprising a finder pattern which defines a target area and a pattern of symbology defining a data field in fixed position relative to the target area, wherein the finder pattern comprises a distinctive pattern and at least a predetermined portion thereof is printed in a luminescent ink having a predetermined visible color, and the symbology defining said data field is printed in an a non-luminescent ink of the same visible color as the finder pattern, the process comprising the steps of: (a) illuminating a document carrying a printed visible image with ultraviolet light; (b) reading the illuminated image with a fluorescence detecting reader; (c) comparing a detected fluorescent image to a reference image; (d) determining if the detected image matches the reference image; (e) if the detected fluorescent image matches the reference image, then setting that image as the target area and illuminating at least a predetermined area of the document; and (f) reading any image appearing in a fixed position relative to the target area.