Posting by way of research for a friend: The friend moved out of the family home 8 years ago, after separating and subsequently divorcing. Currently renting with her teenage twins, the landlord may be selling up. Both parties remain on the mortgage....[mortgage payments not straightforward - however at this point in time both spouses would have paid in similar amounts over the years - be it monthly or via lump sum]. My friend is just wondering - worse case scenario - Could they just move back in ??!! The locks may have been changed? but if both of them are contributing to the mortgage - and there is nothing in the divorce agreement - is there anything legally that prevents this person and her children moving back in?