Banks are required to identify customers in most customer calls. Traditional knowledge-based identification and verification (asking security questions e.g. the account number, last transaction amount and other details) is not secure enough and annoys clients. Spitch natural language hybrid voice biometrics solution increases customer satisfaction and improves security at the same time. It works best when clients make calls from non-registered telephones and saves additional 15% of client's and agent's time during the call.