DocuGard Security Business Checks with a marbled pattern incorporate 11 security features recommended by the National Check Fraud Center and Check Payment System Association. They are compatible with most money-management software programs. Front security features Check-21 compliancy, hidden message ("VOID" appears when copied), an erasure-resistant background and a security warning that calls attention to the security features listing on the reverse side. Back security offers a security features listing, hidden message, microtext printing, anti-splice backer, verification number and watermark that is printed in coin-reactive ink. Top section features a marble green line for a distinct look. Perforations are 3-1/2" and 7" from the top. Checks are for use with all laser and inkjet printers.DocuGard Security Business Checks with a marbled pattern incorporate 11 security features recommended by the National Check Fraud Center and Check Payment System Association. They are compatible with most money-management software programs. Front security features Check-21 compliancy, hidden message ("VOID" appears when copied), an erasure-resistant background and a security warning that calls attention to the security features listing on the reverse side. Back security offers a security features listing, hidden message, microtext printing, anti-splice backer, verification number and watermark that is printed in coin-reactive ink. Top section features a marble green line for a distinct look. Perforations are 3-1/2" and 7" from the top. Checks are for use with all laser and inkjet printers.