Patent ID: 7742154

Claim:
A method for testing value documents, comprising the steps: irradiating the value document at least in an area of the value document from a first irradiation direction and measuring value document radiation in the value document area from a first detection direction, irradiating the value document area from a second irradiation direction differing from at least one of the first irradiation direction and measuring value document radiation in the value document area from a second detection direction differing from the first detection direction, forming a first measuring value from the measured radiations by adding up the measured radiation values, forming a second measuring value from the measured radiations by subtracting the measured radiation values, deducing a statement about features of the value document, which relate to at least one of the authenticity and type of the value document, with the help of the first measuring value, and deducing a statement about features of the value document, which relate to the state of the value document, with the help of the second measuring value.