I found a wallet once with £300 cash and a debit card/credit card etc. I rung the bank and told them that id found a wallet and gave card number/person's name etc. .. no response. After 2 days I rang the bank again giving the same details and also my mobile number - again, .. still no response, .. so without guilt, I pocketed the £300 and set fire to the wallet and card. .. the end.