Checking apparatus for documents

Abstract From the Canadian patent

An apparatus for determining the identity or authenticity of a document and/or the identity of a user of a document to determine if such person is authorized to do so, and which document is formed as a data carrier, comprising readers for data which can be automatically read and applied to the document. A keyboard or equivalent structure is provided for the infeed of a secret code such as a number(s), letter(s) or other characters as is also an, evaluation circuit. The evaluation circuit comprises a fixed storage where there can be stored constant data and data processing programs, an access circuit which evaluates parts of the automatically readable data of the document and/or the secret …