---
product_id: 2957646
title: "351R1 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 12),Black"
brand: "dri mark"
price: "$50.44"
currency: USD
in_stock: true
reviews_count: 11
category: "Dri Mark"
url: https://www.desertcart.us/products/2957646-351r1-counterfeit-bill-detector-marker-pen-made-in-the-usa
store_origin: US
region: United States of America
---

# Instant chemical reaction for quick verification Pocket-sized for on-the-go security 3x more ink for extended use 351R1 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 12),Black

**Brand:** dri mark
**Price:** $50.44
**Availability:** ✅ In Stock

## Summary

> 🕵️‍♂️ Spot fakes before they cost you—because your business deserves real money.

## Quick Answers

- **What is this?** 351R1 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 12),Black by dri mark
- **How much does it cost?** $50.44 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/2957646-351r1-counterfeit-bill-detector-marker-pen-made-in-the-usa)

## 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

- • **Triple Ink Power:** 3x more ink means fewer replacements and nonstop fraud protection.
- • **Compact & Discreet:** Sleek pocket size fits perfectly in your wallet or apron—always ready when cash flows.
- • **Bulk Pack Advantage:** 12 pens per pack to keep your entire team armed against fake money scams.
- • **Instant Authenticity Check:** Chemically sensitive ink reveals counterfeit bills in seconds—no guesswork, no delays.
- • **Universal Currency Compatibility:** Works flawlessly on all U.S. bills from 1959 onward—future-proof your business.

## Overview

The 351R1 Counterfeit Bill Detector Marker Pen is a professional-grade, pocket-sized tool made in the USA, featuring 3 times more ink for long-lasting use. Its chemically sensitive ink instantly marks genuine U.S. currency (1959 and later) with an amber color, while counterfeit bills show a dark brown or black mark. Ideal for small businesses and retail professionals, this pack of 12 pens offers reliable, fast, and easy fraud protection to safeguard your cash flow.

## 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: Well worth the money - I own a small clothing business and recently I have been having trouble picking out the counterfeit bills. I decided to purchase these to fight the problem. They are very simple to use and when marked on a counterfeit bill it makes an obvious dark mark. It has saved me from accepting numerous 50 dollar and 100 bills since I have purchased it. Well worth it. Also the prices on desertcart can't be beat. At a local store I found them at more than double the cost on desertcart. I would buy them again.
Review: Did the job. - Showed up on time, did what we needed.

## 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 | B0000AQOBJ |
| Additional Features | Portable |
| Best Sellers Rank | #120,816 in Office Products ( See Top 100 in Office Products ) #52 in Counterfeit Bill Detectors |
| Body Shape | cylindrical |
| Brand | Dri Mark |
| Brand Name | Dri Mark |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 198 Reviews |
| Global Trade Identification Number | 00070889035165, 50070889001370 |
| Hand Orientation | Ambidextrous |
| Included Components | Counterfeit Detector Pen pack of 12 |
| Ink Base | Hybrid |
| Ink Color | Black |
| Is Waterproof | false |
| Item Dimensions | 5.75 x 3.25 x 1.25 inches |
| Item Dimensions D x W x H | 3.2"D x 5.8"W x 1.3"H |
| Item Type Name | Currency Verifying Pen |
| Item Weight | 0.29 Pounds |
| Line Size | 2 months |
| Manufacturer | DRI-MARK PRODUCTS |
| Manufacturer Part Number | 351R-1 |
| Material Type | Plastic |
| Model Name | Smart Money |
| Model Number | 351R-1 |
| Number of Items | 1 |
| Number of Pieces | 12 |
| Pattern | Checkered |
| Point Type | Medium |
| Recommended Uses For Product | Writing |
| Style | Counterfeit Pen |
| Surface Recommendation | Paper |
| Target Audience | Adult |
| Theme | Security |
| UPC | 070889035165 999992627992 804993412211 999993914152 801593149219 809301932481 033587463210 640206512855 013243031885 |
| Unit Count | 12.0 Count |
| Warranty Description | Contact Manufacturer |
| Water Resistance Level | Not Water Resistant |
| Writing Instrument Form | Marker Pen |

## Product Details

- **Brand:** Dri Mark
- **Ink Color:** Black
- **Number of Items:** 1
- **Point Type:** Medium
- **Recommended Uses For Product:** Writing

## Images

![351R1 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 12),Black - Image 1](https://m.media-amazon.com/images/I/71xZzJ-04cL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Well worth the money
*by L***8 on June 21, 2015*

I own a small clothing business and recently I have been having trouble picking out the counterfeit bills. I decided to purchase these to fight the problem. They are very simple to use and when marked on a counterfeit bill it makes an obvious dark mark. It has saved me from accepting numerous 50 dollar and 100 bills since I have purchased it. Well worth it. Also the prices on Amazon can't be beat. At a local store I found them at more than double the cost on Amazon. I would buy them again.

### ⭐⭐⭐⭐⭐ Did the job.
*by B***T on October 16, 2023*

Showed up on time, did what we needed.

### ⭐⭐⭐⭐⭐ Great pens that save you money in the long run!
*by L***N on December 20, 2014*

We've got a big counterfeit bill problem in the city where I work, so we decided to start checking. I priced these pens at a few big box stores and they all wanted a ton of money for just 2 or 3 pens. Luckily I stumbled across these on Amazon. I gave them out to all our drivers and they certainly work--they've kept us from accepting at least 6 counterfeits in the past month. A solid product at a good price.

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**Shop now:** [https://www.desertcart.us/products/2957646-351r1-counterfeit-bill-detector-marker-pen-made-in-the-usa](https://www.desertcart.us/products/2957646-351r1-counterfeit-bill-detector-marker-pen-made-in-the-usa)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-21*