The counterfeit note detector marker is the indispensable quick and portable verification tool to protect your business against financial fraud. Formulated with a special chemical reagent in the form of a ballpoint pen, simply make a small mark on the banknote: if the mark remains clear or yellowish, the note is genuine; if the mark darkens to brown or black, the note is suspicious. Its compact size fits perfectly in a pocket or next to the cash register. Essential for merchants, market vendors, taxi drivers, restaurants and distribution companies.