I had something similar happen to me. Parking offence, car registered to my address etc. I called and wrote to the council who wanted me to prove the car owner didn't live here, I replied the burden of proof was on them. I kept copies of all correspondence. The debt collection agency appointed by the council contacted me, I sent them copies of the correspondence. A bailiff finally turned up on my doorstep. I repeated the story and showed him my letters and he was happy to take my word that the driver didn't live here. I haven't had any more problems since.