Contactless bank cards
jon+ukcrypto at unequivocal.co.uk
Tue Nov 16 16:39:33 GMT 2010
On Tue, Nov 16, 2010 at 03:07:52PM +0000, Roland Perry wrote:
> In most shops my observation (from the customer side of the till) is
> that to "put through" a card transaction you first need to ring up a
> sale on the till, and then link that transaction to the C&P terminal.
> You can't just "invent" a transaction out of thin air (the way you used
> to be able to with carbon paper receipts and the mechanical swipe
Oh, well in small retailers my observation, and also as I understand
it, reality, is that the merchant terminal is usually not connected to
the till and you can put any number of transactions through without
the till knowing anything about it.
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