Clips and other fastening are available for nearly every purpose. Whether for clamping, sticking, clipping or with the help of a magnet – with these little aids, plastic cards can be attached to nearly any object of piece of clothing. Extra care needs to be given to cards with data carriers. Cards with RFID-chips, for example, should not by equipped with a hole for fastening them on a clip or this should only be done by an expert. Magnet fastenings are not suitable for cards with magnet stripes. The selection of the wrong fastening method can lead to the uselessness of the card.