The theory of the unicity of patrimony is highly used in French law but its application causes however huge difficulties. Due to an indivisible and unique patrimony, creditors can seize all goods, which represent a legal risk for entrepreneurs. The theory doesn’t allow a division of the patrimony. In a legal perspective, the legislator has to compose with legal structures or to propose new models. The patrimony of affectation is one of these models proposed as remedy of legal risks. The purpose of this article is to offer a critical of the patrimony of affectation through the analyze of trust on one side and the analyze of individual entrepreneur’s situation on the other. The first section discusses the growth and consecration of the patrim...