I have been recieving letters from a debt collection agency, to my address but a name totally unknown to me. Apparently this person owes over £6k on a credit card and although I have contacted the debt collection agency and the bank originally involved, I am still recieving letters re debt to my address. Any ideas how this would affect my credit rating and how to stop them sending letters to my address. I only opened the first letter by mistake and the rest have been returned to sender.