FIELD: technology for checking authenticity of document with counter-falsification protection, and also document with perforations of elongated transverse section.
SUBSTANCE: in accordance to method for checking authenticity of document, aforementioned document contains carrier with multiple perforation, and at least some perforations have elongated transverse cross-section with minimal and maximal diameter. Checking method assumes presence of document examination stage, in at least one direction of examination, which is not perpendicular to surface of carrier, and determining authenticity of document on basis of value of optical light penetration through aforementioned perforations.
EFFECT: high counter-falsification protection on basis of use of perforations.
2 cl, 6 dwg
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