I recently visited the Asda supermarket at Shipley, which operates a two-hour parking limit policy, but unfortunately I was late in returning to my car and found a parking notice attached to my windscreen. When the fine when received it was promptly paid by cheque by myself. My bankers have since confirmed that this was cashed six days later. I have now received a demand notice for almost double the original "fine", which also includes threats of possible legal action. I would therefore appreciate your advice as to the next course of action because as you can appreciate I do not want this to affect my credit rating.