How does the Dri Mark Counterfeit Detector Pen work?

The iodine-based ink reacts with starch in fake bills, turning dark. On real U.S. currency (starch-free), the mark stays light.

Can it detect foreign bills?

Standard pens are for U.S. bills only. Dri Mark’s Universal Pen can check some foreign currencies but not polymer bills.

Is it effective on old and new bills?

Yes, it works on all U.S. bills since they all use the same cotton-linen paper without starch.

Can counterfeiters fool the pen?

Advanced fakes using real paper (like bleached bills) may pass. Use UV lights or other tools for better security.

How long does the pen last?

It lasts long due to a larger ink supply. Keep the cap on tightly and store it cool and dry to maximize life.

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🕵️‍♂️ Spot fakes fast, protect profits smarter.

TRIPLE INK POWER - 3x more ink means longer use without bulk—carry confidence in your pocket.
BULK PACK ADVANTAGE - Five pens per pack to keep your business protected across multiple points of sale.
COMPACT CONVENIENT - Sleek, pocket-sized design fits perfectly in any professional’s toolkit or cash drawer.
INSTANT FRAUD DETECTION - Mark bills and get immediate, reliable results—dark means fake, light means legit.
TRUSTED AMERICAN CRAFTSMANSHIP - Proudly USA-made with 30+ years of expertise—no substitutes, only authenticity.

The Dri Mark CFD5PK Counterfeit Bill Detector Pen is a compact, USA-made tool featuring three times more ink than previous models for extended use. Trusted for over 30 years, it instantly identifies fake U.S. currency with a simple mark—dark ink signals counterfeit bills, while light ink confirms authenticity. Designed for professionals in retail, banking, and hospitality, this pack of five pens ensures reliable fraud protection wherever money changes hands.