I.-The qualified electronic signature certificate referred to in Article R. 123-5 falls at least, pursuant to 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, into one of the following categories:
1° A qualified certificate issued by a qualified trust service provider meeting the requirements of the said regulation;
2° A certificate issued by a certification authority, French or foreign, which meets the equivalent requirements in Annex I of the said regulation.
II.-The signature formats are XAdES, CAdES or PAdES as referred to in Articles 1 and 2 of Commission Implementing Decision (EU) No 2015/1506 of 8 September 2015 laying down specifications for the formats of advanced electronic signatures and advanced electronic stamps to be recognised by the public sector bodies referred to in Article 27, (5) and Article 37(5) 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.
The signatory uses the electronic signature creation device of their choice.
III.-The validity of the signature verification procedure is established by a functional check that covers at least the following points:
1° The identity of the signatory;
2° Whether the signatory’s certificate belongs to one of the categories of certificates mentioned in I;
3° Whether the signature format mentioned in II is complied with;
4° Whether the certificate has not expired or been revoked at the date of signing;
5° The integrity of the signed document.
These verifications may be carried out automatically, with the exception of verification of the identity of the signatory.
The system used to validate the electronic signature provides the result of the validation process and enables any problems relating to security to be detected.
The instructions for checking the validity of the electronic signature are made available free of charge when the signed document is submitted.