This sounds very ridiculous, but I was mis-sold an account in my late teens/early twenties which would have been in the early noughties. I was told it would reduce my overdraft fees and I would get holiday insurance etc. I was not told there was a monthly fee and only discovered this a couple of years later on a bank statement. At the time I just put it down to being stupid and accepted it as my fault (I was young and not particularly confident challenging it with my bank), but now I'm wondering if it is possible to claim back after some 12-15 years since I cancelled it? I've had a look on a few sites and it doesn't give a specific time period that you can claim, but I've also seen that banks are only obliged to keep records for 10 years.
Anyone managed to do this for charges from this way back? I don't even have any idea on the exact dates I was signed up to the account.