Detects counterfeit in seconds with 2 simple tests.  Pen end tests for suspicious paper while the UV light on the other end checks for security threads.

Counterfeit detector pens are an inexpensive and reliable screening device. They are effective for retailers, restaurants, stores, banks...any cash business. Easy to use...simply mark the bill; clear is genuine, black or dark brown is suspect. Also available with UV light to identify security threads. Priced each.