Patented Anti-Tamper Security helps prevent check fraud by utilizing an extra layer of security to your printed checks. TROY's MICR Toner Secure releases a red dye whenever chemical alteration is attempted, voiding the check. TROY's unique manufacturing and testing process has produced a precision-matched toner for each specific printing machine. This helps maintain optimum laser printer performance. Because of the high adhesion of our toner, scraping fraud is nearly impossible to commit.