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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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).
  • 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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