The Dri Mark Counterfeit Detector Pen is your best first defense against loss due to counterfeit. An essential for any retail business accepting cash. Simply uncap the pen and make a small mark on US currency. If the mark tu...

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Product Review

The Dri Mark Counterfeit Detector Pen is your best first defense against loss due to counterfeit. An essential for any retail business accepting cash. Simply uncap the pen and make a small mark on US currency. If the mark turns dark brown or black, the currency is suspect. If the mark remains light yellow, the bill passes the test.

  • Simply make a small mark on U.S. currency.
  • Chemically sensitive ink works instantly.
  • Amber mark passes the test, while a dark brown or black mark means the bill is suspect.
  • Works on all new design U.S. currency (1959 and later).

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