With the widespread use of the Internet and the resulting increase in the use of online services, the risk of encountering fraudulent individuals is rising for private customers, business customers and the companies themselves. Accordingly, for security reasons it is important and often mandatory to identify the customers of payment service providers by means of Know-Your-Customer (KYC). It is particularly necessary in all areas of the financial sector. These are obliged to comply with money laundering laws (anti-money laundering) and the associated identification of users. This means that anyone who wants to open and use an account with a payment provider must go through this procedure. Identification is used, for example, to detect people who have stolen other people’s data. With the right identification procedure, it is almost impossible to be confirmed with false personal data.