Roland Perry wrote:

But the facility in question is being sold as an *alternative* to the
retailer having to install such a POS system with instant access to their
internal database of historical transactions.

Is it really? Can you quote some text suggesting that?

Every PayWave terminal I have seen so far has just been a more modern PDQ
machine/PIN pad connected in some way to the host ePOS system. The
capability may be as simple as the card generating a unique identifying
hash from the card number (assuming that such PDQ machines don't pass the
card number to the host). Not many shops now don't have any form of ePOS
at all.

Bus ticket inspections could be done by having the ticket machine print out
a ticket containing the last 4 digits of each credit card used during that
journey, perhaps. Or more technologically, communicate it to the
electronic gripping irons.

They could, yes. But *are* they? (Minor niggle: the Paywave terminals on
the buses don't have printers).

Aren't they just using the Oyster pads to read them? Those are part of the
ticket machine, which does have a printer.

If they are separate, like the Oyster pads at intermediate doors on the old
bendies, they are I suspect connected to the ticket machine by some means.

Neil
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Neil Williams in Milton Keynes, UK. Put first name before the at to reply.