Improved method for making credit documents in general and device for detecting property marks thereon

摘要

There is disclosed an improved method for making credit document in general and for suitably detecting property marks or signs thereon,so as to prevent non authorized persons from using the documents.To this end,the method comprises the step of providing the document with a code for detecting and biometrically identifying the authorized user or owner,which step is performed based on the provision of a biometric sensor and a comparator for comparing the identification code with the code sensed by the biometric sensor.