A method and a system for person/speaker verification via different communications systems. The system may include a control logic (SL) having access to a voice-controlled dialog system (DS) having verification dialogs stored for querying, a biometrics customer profile (BK), in which the personal biometric data of customers are stored and a provider database (PD), which contains information regarding protected database areas and services in conjunction with the biometric methods authorized for verification. The method for person/speaker verification is designed to ascertain, transmit, analyze and evaluate via telecommunications systems the different personal biometric data that are suitable to establish unequivocally the access authorization of a customer.