Video guide for electronic signatures

Here you can find step-by-step videos that describe how to use a certificate as an advanced electronic signature.

Set up a time stamp server service

Here you can download the fdf file of the time stamp server: https://uni.koeln/53CCX

Set up personal certificate

Usage

Validiation

Here you can find a guide if you want to carefully check the electronic signature(s) in a PDF document: advanced validation.

Errors that may occur during validation and their handling can be found here: (Error)Messages.