Electronic data and documents per se lack important properties, including integrity and authenticity. But without these, reliable and trustworthy action on the Net is not possible.
An electronic equivalent is also needed for declarations of intent that are documented on paper documents with a manual signature. Electronic signatures, their validation, and long-term storage that preserves the value of the evidence are the answers here, which go hand in hand with quite a few legal and technical requirements, from the European eIDAS regulation, to the Trust Services Act, to technical guidelines from the German Federal Office for Information Security (BSI).
Governikus has several solutions in its portfolio that can be used depending on the application scenario.