After a certain age, the question arises of the transmission of his business. A transmission that can be suffered (death of the entrepreneur) or anticipated (through a donation, in particular). As such, the transmission, by gift or by inheritance, of shares or shares of a company may be exempt from transfer duties up to 75% of their value. To benefit from it, the securities transferred must be subject to a retention agreement, also called the “Dutreil Pact”. Return on the conditions of application of this device.