Have you had this sorted dude?
We had this for over a year when we moved into our current place. just keep telling them that person doesn't live there anymore. They'll work it out in the end. As the usual advice, don't let them in, send proof if they ask for it and don't worry about it. They can't take your stuff if you're not in debt. If it goes to some kind of court level, by the time they've actually done research into serving a court order they'll have worked out the person's correct details.
We had this for over a year when we moved into our current place. just keep telling them that person doesn't live there anymore. They'll work it out in the end. As the usual advice, don't let them in, send proof if they ask for it and don't worry about it. They can't take your stuff if you're not in debt. If it goes to some kind of court level, by the time they've actually done research into serving a court order they'll have worked out the person's correct details.