KARTENFOERMIGES ZAHLUNGSMITTEL

摘要

The means of payment has optical markings (6) which are arranged between two protective layers (2, 3) impermeable to visible light and which can be cancelled by the supply of thermal energy. To make the remaining value of the means of payment or the number of used value units visible, at least part of the surface of the means of payment has a thermochromic material. One protective layer (2) can be coated with a covering layer (5) consisting of thermochromic material or can itself contain thermochromic material. A value scale can be printed onto the means of payment.