Good thinking. Works on two of my site passes but not the third. Can'tBy shining a bright LED torch though various MiFARE type cards I can
easily see the aerial wires running round the cards, but on a Barclays
contactless card I can't see anything other than the chip itself ...
spot an obvious aeriel loop on any of my Visa cards, only one of them is
marked contactless enabled. Perhaps it is behind the ferrite stripe or
the tamper proof signature strip? One of the two holograms is "blotchy",
the other is completely opaque.