How to Use a Counterfeit Pen to Verify Authenticity

Written by Laura Walker / Fact checked by Leilani Carroll

How to Use a Counterfeit Pen

One indispensable tool against circulation of fake currency is the counterfeit pen. It is a simple, yet effective device designed to quickly verify the authenticity of banknotes.

With the specially formulated ink, these pens can detect various counterfeit bills, safeguarding your financial well-being.

In this comprehensive guide, we will delve into how to use a counterfeit pen, with insights and practical tips to help you with counterfeit detection.

How to Use a Pen to Verify Money

Step 1: Acquire a Counterfeit Pen and Gather Currency


  • Pick a counterfeit marker with good quality and reviews. You can get a decent piece at around $10.
  • You should also gather a selection of banknotes representing various denominations to practice your counterfeit detection skills.

Step 2: Familiarize Yourself With Genuine Currency Features

Before using a counterfeit detector pen, it is essential to become acquainted with the security features of genuine banknotes.

Study the specific characteristics of the currency you commonly encounter, such as:




Security Threads






Color-shifting Inks


This knowledge will serve as a baseline for identifying suspicious bills.

Step 3: Understand the Counterfeit Pen’s Working Principle


How do counterfeit pens work?

A pen for fake money operates on the principle of chemical reactions. It contains a specialized ink that reacts differently when applied to counterfeit versus genuine banknotes.

The ink typically changes color—usually light brown or amber for genuine currency and black or dark blue for counterfeit bills.

Step 4: Perform the Counterfeit Pen Test


To begin, select a banknote to test. Follow these steps to perform the counterfeit pen test:

  1. Hold the banknote under a good light.
  2. Uncap the counterfeit pen and take note of the ink’s appearance.
  3. Carefully draw a small line or make a mark on a discreet area of the banknote, preferably on a blank space.
  4.  Observe the ink’s reaction within a few seconds.
  5. Take note if the money turns brown or turns yellow.

Step 5: Interpret the Results


Interpreting the counterfeit pen’s response is crucial for determining a banknote’s authenticity. Here is how to interpret the counterfeit pen color meanings:

  • If the ink remains light brown or amber, the banknote is likely genuine.
  • If the ink turns black or dark blue, the banknote may be counterfeit or suspect.


While the counterfeit pen is a valuable tool, it is not foolproof.

Money pen checkers continually refine their techniques, making it essential to employ additional measures to bolster detection. Consider the following supplementary steps after interpreting the fake money pen colors:

  • Verify other security features such as watermarks, security threads, and microprinting.
  • Consult official banknote guides or use smartphone applications that provide detailed information on currency security features.
  • Seek professional training or use advanced counterfeit detection equipment for high-risk environments.

Frequently Asked Questions (FAQs)

 What is a Counterfeit Pen, and How Does It Work?

A counterfeit pen is a simple tool used to detect counterfeit banknotes. In other words, it is a fake cash checking pen.

It contains specially formulated ink that reacts differently when applied to genuine versus counterfeit currency. The pen’s ink changes color to indicate the authenticity of the banknote.

You can compare the color change to a counterfeit pen color chart to determine whether a banknote is fake.

Are There Any Limitations to Using a Money Verification Pen or Conducting a Marker Test on Money?

Yes, when carrying out a marker on money test, there are limitations to consider:

  • The security pen for money is most effective for detecting counterfeit bills printed on standard paper, but it may not work as well on more sophisticated counterfeit banknotes.
  • Some counterfeiters may use chemicals or coatings to mimic the pen’s reaction, making it important to consider additional security features.
  • The bill marker’s results should be interpreted as an initial indication of a banknote’s authenticity, and further verification is recommended.

Can a Money Pen Checker Detect All Types of Counterfeit Currency?

While a money checking marker is a useful tool, it may not detect all types of counterfeit currency.

Counterfeiters are always adapting their techniques and creating more sophisticated counterfeit banknotes that may evade detection. Therefore, it is crucial to stay updated on the latest security features and employ multiple detection methods.

Are There Specific Guidelines for Using Currency Markers in a Business Setting?

Each business may have its own procedures, but general guidelines tell if a bill is fake with a marker include:

  • Train employees on how to properly use the counterfeit pen.
  • Perform regular inspections of banknotes at the point of sale or during cash handling processes.
  • Establish protocols for handling suspected counterfeit bills and reporting them to the appropriate authorities.


By following the steps outlined in this guide on how to use a counterfeit pen, you can enhance your ability to identify counterfeit money and protect yourself from financial loss.

However, it is important to remember that pens and markers for checking money are just one tool in the arsenal of counterfeit detection. While it provides an initial indication of a banknote’s authenticity, it is not infallible.

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