Each denomination has unique micro printing. The blue glow, colored paper threads, watermarks, and holograms are unmistakable and easy to identify . It takes just seconds to use. We recommend fanning out the bills and viewing multiple bills at one time. If any appear blue, then check those specific bills further.
Many people invest in security systems, but they have never been robbed.
It can also be used on many other forms of payment and identification, not just currency. The pen is only used to detect paper type. To show how truly ineffective it is, take real currency and the newspaper, and mark on both with your money tester pen. It can be placed under a counter or on top of the counter. The product is most effective if the public can see it, but it can be placed anywhere the user has access to it.