My best friend moved into a house with her boyfriend. They have since broke up and he doesn't want to move out of the house. He put absolutely no money into the house at all. Her grandparents put down the downpayment and she has paid the mortgage every month. He hasn't put a penny into buying the property at all but now insists that the house is half his since he is on the mortgage papers. Is there anything she can do to get him to leave? If they go to court and she can prove that he put no financial support into the house and could that make a difference in her being able to make him leave?