Thanks for your opinion.

Thanks, everyone, for your input. I checked this out with citizens advice this afternoon and been advised to challenge the card operator. This is not a "mistaken deposit" but is classed as a sale. As I have a receipt stating the exchange rate charged, the bank have therefore agreed that rate for the transaction (erroneous or otherwise). Not only do I not have to pay anything back but the balance left on the card is rightfully mine too.

Is your response based on some fact or experience or just opinion? I was looking for advice on the legality of the situation. I have a receipt for the transaction where I "bought" some US dollars at a very good exchange rate. Its like putting something through the till at Tesco and the barcode calling up the wrong price. Once they have completed the transaction is there a legal right for them to take the goods back. How about the case at ASDA a few months ago where the petrol from the automated pump went through at £0.05 per litre, did ASDA have a right to claim all that petrol back?

Hello all, wondered if I might get some advice on this situation. I was on holiday in the US last week and made use of a Thomas Cash Passport pre-paid USD card. When I reloaded it with a small amount (£75 for $110) to see me to the end of the holiday I was somewhat surprised to see they had actually reloaded the card with $1100. I have a receipt showing they "sold" me $1107 for £74. Thinking this too good to be true I headed to the ATM and there was no mistake, it let me draw out $700 . Shortly after the card was "suspended" and I was no longer able to use it. On returning to the UK I dug out the T&Cs and there is nothing in that about reload errors only that if they suspend the card they will inform me in writing of the reasons. Being a bit cheeky I rang them up to query why my card had been suspended. They had to go away and check and rang me back later that day to tell me that it had been suspended until I paid them back $600 I owed them, if I didn't pay it back they pass me on to a debt collector. Doesn't sound right to me, ok its obvious they screwed up but surely that is their problem and I just got a very good deal?