Hologram
A hologram is a sticker on which the image can change and shimmer when the card is tilted. Such decor effectively fits into the design.
For each print run, a hologram for RFID cards is made to order. That is why it is made in a unique design. The hologram can have a company logo, any text, number or drawing. The sticker is placed on the front or back side.
It is difficult to forge a holographic sticker for plastic cards, as well as to rip it off. That is why it is used for copy protection of RFID cards.