Hi Sincere apologies if this thread is in the wrong place, or if there's another identical thread (I looked and couldn't find one). I purchased something (£500ish) that was faulty from a large online retailer, they then gave me a refund before I sent it back to buy a replacement - which I did using the refund. In the meantime I sent the original faulty item back and they then refunded me again once they received it. I've since received the item I bought using the original refund and my online account balance for this retailer still shows my second refund. My questions are quite simple really: Is it my responsibility to to tell them? Can I keep it? What happens if I keep quiet? Thanks in advance