As with many other electronic legal or banking transactions, you must be able to prove your own identity 100% securely. This is initially done via a short (approx. 10-minute video identification procedure), in which your personal data and also biometric data are checked by a state-recognized service provider (Trust Service Provider).
After that, you will be able to use a mobile phone app to additionally verify every digital signature you make. The mobile phone is therefore your second security factor in addition to your e-mail address, which you need anyway to sign and obtain signatures. Learn how to get your qualified signature.