So what's the scam they're working? I've been wary of the contactless cards since first hearing about them, but the companies say there's no risk. A fraudster would first have to have a device capable of communicating with the RF responder in the card. I'd assume that a POS terminal would work for this purpose, and one could be stripped down to the essentials for portability, and perhaps equipped with a purpose-specific antenna so it could get a little better range when "talking" to the embedded chip.