Arrangement with a card for value transactions

Arrangement with a card which can be used in initiating a value transaction and which can be read in card-reading equipment which provides information and/or cash in dependence on the initiation, and an adapter can be applied or allocated to the card, which adapter can be applied in a corresponding manner to the card in the card-reading equipment, and in that the adapter is arranged to provide an indication of whether or not the card-reading equipment is authentic and has the authority to service the card in question, characterized in that the adapter includes circuits operating with intelligence which wholly or partially participate in an authentication- or authority-determining procedure with respect to the cardreading equipment, the adapter is arranged so that it cannot be swallowed by the card-reading equipment or the terminal including the letter, the adapter comprises first stop surfaces which can interact with corresponding second stop surfaces on the terminal with the aim of making it impossible for the adapter to be drawn into the card-reading equipment and to be retained by the same.