Patent ID: 8020776

Claim:
A multi-layer body comprising an optically machine-readable identification, wherein the multi-layer body has at least one first plastic material layer with a microscopically fine relief structure shaped in that layer and the optical effect of the microscopically fine relief structure can be altered region-wise for writing in an item of information, and wherein the multi-layer body has a plurality of first and second regions, wherein, in the first regions, a microscopically fine first relief structure and, in the second regions, a microscopically fine second relief structure, which is different from the first relief structure and which has a different optically machine-detectable effect are shaped in the first plastic layer, the first and second regions are arranged in the region of the optically machine-readable identification in the form of a background pattern encoding a first item of information, in the region of the optically machine-readable identification the optical effect of the microscopically fine relief structures is altered in third regions which at least partially cover over first or second regions for writing in an individualized code pattern which encodes an individualized second item of information and which overlaps the background pattern, wherein the individualized code pattern is formed by a reflection layer or an optical separation layer of the multi-layer body being removed by thermal action or altered in its optical effect or the relief structure being altered or a thermochromic dye of a protective layer of the multi-layer body being activated, in the regions of the optically machine-readable identification, that are not associated with the individualized code pattern.