There is some obscure law that says it's illegal to pay for something with more than a certain number of coins (I think it's something like 27), but it's quite acceptable, if the teller refuses payment in so many coins, to walk out with the goods, having made a bona fide attempt to pay. Mind you, I've never tried it...

I used to use the 'pay at pump' option as this meant I wasn't being overlooked by people in the queue or the teller. Trouble is, most petrol stations have removed that option, so now you have no choice but to go to the desk and run the risk of card cloning and PIN theft. That's why more and more retailers are using the chip and pin readers that don't require the staff to touch either the reader or the card.

LTS