This bill checker has been the standard in counterfeit detection for over 25 years.
Dri Mark is the original patent holder and only domestic manufacturer of counterfeit detector pens. For over 25 years, the Dri Mark Counterfeit Detector Pen has been the best-selling and most successful counterfeit detection product in the industry. More recently, Dri Mark has pioneered the use of LED technology for counterfeit detection. Today, Dri Mark is the leader in point-of-purchase counterfeit detection.