Patent Document ID: 9646448
Application ID: 14430044
Patent Status: 1

Claim One:
1. A method for verifying an authenticity of a security document, wherein said security document comprises a substrate, at least one perforation pattern in said substrate, and a security feature on said substrate, wherein said perforation pattern comprises a plurality of perforations of at least a part of said substrate, wherein to the naked eye of a human observer at least one of said perforations is not visible in a reflection mode, and wherein the method comprises steps of acquiring a transmission mode image of at least a part of said perforation pattern of said security document by means of a verification device, acquiring a reflection mode image of at least a part of said perforation pattern of said security document by means of said verification device, acquiring a reflection mode image and/or a transmission mode image of said security feature of said security document by means of said verification device, determining a relative positioning of at least one of said perforations with respect to said security feature, and verifying by means of said verification device said authenticity of said security document using said transmission mode image of at least said part of said perforation pattern, said reflection mode image of at least said part of said perforation pattern, said reflection mode image and/or said transmission mode image of said security feature, and said determined relative positioning.