---
product_id: 69082638
title: "Dri Mark 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1)"
brand: "dri mark"
price: "€ 26.58"
currency: EUR
in_stock: true
reviews_count: 5
category: "Dri Mark"
url: https://www.desertcart.pt/products/69082638-dri-mark-351b1-counterfeit-bill-detector-marker-pen-made-in
store_origin: PT
region: Portugal
---

# Instant chemical reaction for quick verification Pocket-sized for on-the-go checks 3x more ink for extended use Dri Mark 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1)

**Brand:** dri mark
**Price:** € 26.58
**Availability:** ✅ In Stock

## Summary

> 🕵️‍♂️ Spot fakes fast—because your business deserves only the real deal!

## Quick Answers

- **What is this?** Dri Mark 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1) by dri mark
- **How much does it cost?** € 26.58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/69082638-dri-mark-351b1-counterfeit-bill-detector-marker-pen-made-in)

## Best For

- dri mark enthusiasts

## Why This Product

- Trusted dri mark brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Pocket-Ready Design:** Discreet and portable for busy professionals
- • **Triple Ink Capacity:** Mark more bills without running dry
- • **Trusted by Thousands:** 4.7-star rating with over 3,800 reviews—join the savvy crowd
- • **Instant Authenticity Check:** Amber means legit, dark means suspect—no guesswork
- • **Universal Currency Compatibility:** Works flawlessly on all U.S. bills from 1959 onward

## Overview

The Dri Mark 351B1 Counterfeit Bill Detector Marker Pen is a compact, USA-made tool featuring chemically sensitive ink that instantly identifies fake U.S. currency by color change. With three times more ink than standard markers, it ensures long-lasting reliability for professionals needing quick, accurate money verification on the go.

## Description

Highly effective and inexpensive tool for detecting bad bills. Simply make a small mark on U.S. currency. Chemically sensitive ink works instantly. An amber mark passes the test, while a dark brown or black mark fails, meaning the bill is likely counterfeit. Works on all new design U.S. currency (bills series 1959 and later).

Review: GREAT PRICE. - WORKS VERY WELL.
Review: No funciona muy bien - Lo use en una hoja de maquina y marco negro. Luego lo use en un billete de dolar en tres puntos distintos y en todos dio un tono diferente. En lo personal, no me ayuda mucho

## Features

- 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).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00006IE9P |
| Brand | Dri Mark |
| Colour | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (3,843) |
| Date First Available | 7 April 2011 |
| Guaranteed software updates until | unknown |
| Item Weight | 4.54 g |
| Manufacturer | DRI-MARK PRODUCTS |
| Manufacturer Part Number | 351B1 |
| Material Type | Not Appilcable |
| Model Number | 351B-1 |
| Number of Drawers | 2 |
| Number of Items | 1 |
| Product Dimensions | 19.05 x 8 x 1.65 cm; 4.54 g |
| Size | 1 Pack |

## Images

![Dri Mark 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1) - Image 1](https://m.media-amazon.com/images/I/71cdU3mIIJL.jpg)
![Dri Mark 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1) - Image 2](https://m.media-amazon.com/images/I/51RJK7PoytL.jpg)
![Dri Mark 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1) - Image 3](https://m.media-amazon.com/images/I/61hi7KBnkGL.jpg)
![Dri Mark 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1) - Image 4](https://m.media-amazon.com/images/I/71JLqAP7gnL.jpg)
![Dri Mark 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1) - Image 5](https://m.media-amazon.com/images/I/613LwY5nGrL.jpg)

## Questions & Answers

**Q: How does the Dri Mark Counterfeit Detector Pen work?**
A: The iodine-based ink reacts with starch in fake bills, turning dark. On real U.S. currency (starch-free), the mark stays light.

**Q: Can it detect foreign bills?**
A: Standard pens are for U.S. bills only. Dri Mark’s Universal Pen can check some foreign currencies but not polymer bills.

**Q: Is it effective on old and new bills?**
A: Yes, it works on all U.S. bills since they all use the same cotton-linen paper without starch.

**Q: Can counterfeiters fool the pen?**
A: Advanced fakes using real paper (like bleached bills) may pass. Use UV lights or other tools for better security.

**Q: How long does the pen last?**
A: It lasts long due to a larger ink supply. Keep the cap on tightly and store it cool and dry to maximize life.

## Customer Reviews

### ⭐⭐⭐⭐⭐ GREAT PRICE.
*by J***T on 20 September 2026*

WORKS VERY WELL.

### ⭐⭐⭐ No funciona muy bien
*by F***G on 14 March 2019*

Lo use en una hoja de maquina y marco negro. Luego lo use en un billete de dolar en tres puntos distintos y en todos dio un tono diferente. En lo personal, no me ayuda mucho

### ⭐⭐⭐⭐⭐ Fonctionne bien
*by F***S on 25 February 2024*

Fonctionne bien

## Frequently Bought Together

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-10-27*