Abstract: This method for dispensing banknotes from an automated teller machine includes, after authentication of a user, a step (122) of dispensing, by an automated teller machine, of banknotes corresponding to a predetermined amount. It involves the establishment (104) of a mobile communication channel between a portable apparatus of the user close to the automated teller machine, and an authentication unit; downloading (110), by the automated teller machine, of a digital code from the authentication unit; transmission (114), by the portable apparatus, via the secured mobile communication channel, to the authentication unit, of a sound signal generated from the digital code and transmitted by the automated teller machine; authentication (118) of the user by the authentication unit; and transmission (122) to the automated teller machine of an instruction to activate the automaton to dispense banknotes corresponding to the predetermined amount.