DocuGard - PRB04543 DocuGard Security Paper is the ultimate fraud fighter with 10 security features. Premier medical blue paper meets and exceeds U.S. Federal CMS guidelines for tamper-resistant security paper. It is ideal for any document not authorized for duplication. Having a combination of security features is important because hidden-message technology (also known as "VOID") is the most common and least dependable with the potential of copies being made without the hidden message appearing. This paper also includes printed watermark; heat-sensitive thermochromatic ink, microtext; colored background with erasure protection; toner lock coating that bonds printed text to the paper; embedded fluorescent fibers which can only be seen with a black light; chemical reactivity; security features listing on back; and coin-reactive ink on watermark that turns black when rubbed with a coin.