The invention relates to the structuring of security elements for documents, devices for checking documents with such security elements and a method for the use thereof according to patent application DE 197 18 916.4. The aim of the invention is to add further security elements to a security element structure for documents and to provide devices for checking said security elements, in addition to proposing a new method for using security elements and devices, which would make it substantially more difficult or even impossible for counterfeiters to produce counterfeit products, which are so close to the original that they cannot be detected by checking devices, by imitating the manner in which the checking procedures and devices work. The security element structure for documents to be checked is designed in such a way that it focuses on the checking procedure rather than on visual observation. Said design, described here as a functional design, is a combination of electrically conducting and insulating structures of the same or varying size, on similar or varying planes, with the same or varying degree of conductivity. Said inventive structure design is produced from metallized structures and/or conductive inks or printing color inks.