Use a UV dull base sheet which is backed with translucent fluorescent fibers and a copy-resistant artificial watermark.
Go through a special treatment so that laser toner is fused to the paper fibers. If tampered with, this will leave marks that will signal alteration attempts.
“Original Document” is visible on the screen on the back of the check
The use of a Micro Print border line makes reproduction difficult
Bleach Protection which displays the word “Void” if bleach is used.