My sister is currently going through a nasty separation, her ex is now living abroad, her youngest is 13 and is living with her in the family home. The family home is in both names, she is trying to get her ex to relinquish his claim on the family home, besides getting his consent what does she have to do ? i.e. what papers does she have to get signed, does she have to register this with the mortgage holders or the land registry ?