Sounds like you are not from the US. In the US we have what is called a "life estate", sound like it might be what you are talking about? A life estate gives the person holding it complete rights to the real estate for the length of their life. They can even sell their life estate, but that life estate ends with their death and so does the right of the buyer to the property. For example, my stepfather has a life estate in his home, with the remainder going to my sister and me. For his life, he has a right to live in the house, or rent it to someone else and keep the money. He is required to take care of the property and pay the property taxes, for all intents and purposes, it is his. However, the sticky part is he can only sell his interest in the house, which is the house for as long as he lives. Who wants to buy a house without knowing how long they will have it to use? He's an old man, if he sells his interest today and dies tomorrow, the buyer is out of luck, it's no longer his house.