Life estate - What are the precautions?

This form of real estate sales report puts a person more often than old (the annuitant) who wants to sell his property while retaining the usufruct until the end of his life and another person, the buyer (débirentier) who agrees to pay an annuity. The main advantage for the seller is to receive income while occupying his house. And for the buyer's interest is to acquire a much less expensive (since it is held), provided that the annuitant does not live 122 years like Jeanne Calment. For this is the main characteristic of real life: the buyer has full ownership of the property from the deed signed by the notary and the rent they pay stops upon the death of the seller (on a life annuity) or spouse (rent two heads). The price paid will therefore largely depend on the life of the seller. A bet can win or lose .... There are two kinds of Life: the free and the occupied. We will not speak first, because it is fairly rare, but only the latter.