A method of manufacturing a certificate having a security feature in the form of a foil piece and a certificate having such a security feature

摘要

Each certificate W1 is provided with a security feature in the form of a flake 2 that is permanently attached to the certificate and can not be changed without damage. Before the flakes are attached to the veneer, the flakes are provided with variable image information (3a, 4a) which is different from each other and is machine-readable. After the flakes are attached, the vials are passed through a reading device. The reading apparatus reads the variable image information (3a, 4a) and controls a printer that prints a copy of the variable image information on the deed outside the foil. This copy may in particular be a combination of letters 7a printed as part of the serial number 6a.