We have lived at this address for ten years, and in that time have received countless letters demanding money from people who don’t live here and to my knowledge never have. I’ve written to one particular debt collection agency many times, and even invited them to visit, but the letters keep on coming.
Your best bet is to put the letters in with the rest of your junk mail for recycling. You’ve done as much as you possibly can to prevent the agency wasting its money. After ten years at the address you will probably be aware whether your credit rating has been affected by the mix-up, but it may be worth checking. The credit reference agencies must supply you with any information they have about you on payment of a £2.00 fee.