A method for the secure verification of the opening of a safe door of a safe of an automated teller machine, in which in a first reading operation the value of a parameter is read from a memory area (32a to 32d) of a cash box (12a to 12d) accommodated in a first storage compartment (42a to 42d) of the safe and is stored in a memory area of a control unit of the automated teller machine as a first parameter value, in which in a second reading operation the parameter value is read from a memory area (32a to 32d) of a cash box (12a to 12d) accommodated in a second storage compartment (42a to 42d) of the safe and is stored in a memory area of the control unit as a second parameter value, characterized in that in a third reading operation the parameter value is read from a memory area (32a to 32d) of a cash box (12a to 12d) accommodated in the first storage compartment (42a to 42d) and is stored in a memory area of the control unit as a third parameter value, in a fourth reading operation the parameter value is read from a memory area (32a to 32d) of a cash box (12a to 12d) accommodated in the second storage compartment (42a to 42d) and is stored in a memory area of the control unit as a fourth parameter, the first and second reading operations are triggered when it is signaled to the control unit with the aid of a door sensor that the safe door is closed, the third and fourth reading operations are triggered after expiration of a maximum admissible period of time for exchanging the cash boxes from when it is signaled to the control unit with the aid of the door sensor that the safe door is open, said period of time stored in a preset manner, or the third and fourth reading operations are triggered by an input via an operating panel, with the aid of the control unit it is checked whether the first parameter value differs from the third parameter value and/or whether the second parameter value differs from the fourth parameter value, and when the first parameter value differs from the third parameter value and/or the second parameter value differs from the fourth parameter value, an opening of the safe door is verified by the control unit, the respective parameter values correspond to respective arbitrary character sequences sequence of letters and/or numerical values of respective serial numbers. in which in a first reading operation the value of a parameter is read from a memory area (32a to 32d) of a cash box (12a to 12d) accommodated in a first storage compartment (42a to 42d) of the safe and is stored in a memory area of a control unit of the automated teller machine as a first parameter value, in which in a second reading operation the parameter value is read from a memory area (32a to 32d) of a cash box (12a to 12d) accommodated in a second storage compartment (42a to 42d) of the safe and is stored in a memory area of the control unit as a second parameter value, characterized in that in a third reading operation the parameter value is read from a memory area (32a to 32d) of a cash box (12a to 12d) accommodated in the first storage compartment (42a to 42d) and is stored in a memory area of the control unit as a third parameter value, in a fourth reading operation the parameter value is read from a memory area (32a to 32d) of a cash box (12a to 12d) accommodated in the second storage compartment (42a to 42d) and is stored in a memory area of the control unit as a fourth parameter, the first and second reading operations are triggered when it is signaled to the control unit with the aid of a door sensor that the safe door is closed, the third and fourth reading operations are triggered after expiration of a maximum admissible period of time for exchanging the cash boxes from when it is signaled to the control unit with the aid of the door sensor that the safe door is open, said period of time stored in a preset manner, or the third and fourth reading operations are triggered by an input via an operating panel, with the aid of the control unit it is checked whether the first parameter value differs from the third parameter value and/or whether the second parameter value differs from the fourth parameter value, and when the first parameter value differs from the third parameter value and/or the second parameter value differs from the fourth parameter value, an opening of the safe door is verified by the control unit, the respective parameter values correspond to respective arbitrary character sequences sequence of letters and/or numerical values of respective serial numbers.