Limitations of the Counterfeit Detection Pen On United States Currency

Abstract

The Counterfeit Detection Pen is one of the most widely used methods of genuine currency authentication and counterfeit currency detection by the public. However, creation of false positives and false negatives severely limit the Pen. This research project determines what creates a false positive reaction on genuine currency and what steps counterfeiters are taking to circumvent the Pen by causing false negative reactions. Laundry starch, French fry grease, and laundry detergent are tested to determine whether they create false positives on genuine currency. Nail polish, oven cleaner, pump and aerosol hairsprays, deodorant, and laundry stain remover are tested to determine whether they create false negatives on counterfeit currency. Application of laundry starch and French fry grease effectively created false positive reactions on genuine currency. Application of nail polish, deodorant, and laundry stain remover effectively created false negatives on counterfeit currency.