In message , at 22:38:02 on
Mon, 4 Mar 2013, Richard remarked:

I can't believe that retrospectively fining people because the gripper says
that you were on the train but your bank account details don't show that you
have paid, is going to stand up to expert court scrutiny.

Well, it's not really a fine. It's a charge for not being able to
demonstrate that you've done the right thing

The Paywave terminals[1] don't give receipts, so it's quite difficult to
demonstrate [2] that you've used the card. The objection is to in effect
allowing your card to be used to collect a PF off all cardholders, which
they'll nullify if it turns out later that you have paid.

[1] eg on the gates into the tube.
[2] To a gripper on the tube system, who probably won't have his own
wireless connection back to the bank.
--
Roland Perry