No. A residual legacy (legs résiduel or de residuo) is a gift upon death (provided for in a will and executed upon your death) that designates a first legatee who will receive a property and will be required to pass it on to a second legatee, provided it still exists in their estate (Article 1058 of the French Civil Code). Therefore, the first legatee may sell or give away the property (unless the will provides otherwise).