The Tracking / Duplex printing module record data will come from either sequential records in a data file on the PC or from being keyed by a barcode read as described above. A portion of the record is printed on one side of the product. Product sensors track the product to a second print station, where additional data from the record is printed on the product. The product is tracked to the diverter where it is “accepted” if valid and “diverted” if not valid.