Security sticker for covering secret information, e.g. number sequence, has information provided on upper layer applied onto interference region

摘要

The information (50) is applied between two stickers which provide security features both individually and in combination. The lower film layer is at least as big as the information being covered and is provided with an interference region (23) in the area where it covers this information. The interference region is at least as thick as the information being covered. An upper layer (24) is applied onto the interference region and the information is provided on this upper layer.