Originally Posted by
KARFA
Yes, they show up at the bottom of the receipt.
Bear in mind that 3V clamped down a month ago for online bill payements so it may be you can't use them for that specific purpose. Perhaps buy 2 and try first knowing that if they don't work you can always buy £50 worth of giftcards from amazon.
Thanks for the note - I did try calling my 'leccy company this morning, but was on hold for ~15mins so gave up. I don't want to buy the cards to be unable to redeem them for the intended purpose. However, presumably I could immediately use them for petrol, so I wouldn't be losing any money.