![]() The answer is in fact Yes, detector pens can fail and give false-positive results. They have to be used in conjunction with other methods of detection. ![]() Due to the evolution of the methods of producing counterfeit bills, they are not very reliable.banknotes used before the year 1960 or during the wars. For example, Detector pens cannot determine the authenticity of U.S. Counterfeit detector pens are practically useless on old notes as the materials and chemicals used to print the currency than from what is being used now.In case you notice a defect in the product you purchased, please alert the customer services of said store. Due to the volatility of its components, it is prone to evaporation thus, one has to ensure that the cap is properly sealed and airtight.The counterfeit detector pen is not exempted from the list as we would be discussing a few: Just as virtually everything we know has its advantages, they also come with disadvantages or limitations. SHORTCOMINGS OF THE COUNTERFEIT DETECTOR PEN You do not have to break the bank to get one of these tools and in turn, they save you from a truckload of challenges. ![]() All you have to do is write and be able to identify what each color means, pretty simple right?
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