An electronic signature shall be validly affixed only by the use of a process that enables the signatory to be identified, guarantees the link between the signature and the document to which it relates and ensures the integrity of that document.
This signature must be at least of an advanced level based on a qualified certificate, within the meaning of Regulation (EU) No 910/2014 of the European Parliament and of the Council of 23 July 2014 on electronic identification and trust services for electronic transactions in the internal market and repealing Directive 1999/93/ EC. However, the mere fact that this signature does not meet the requirements of an advanced level electronic signature based on a qualified certificate cannot constitute grounds for invalidating the procedure.