1. Member States requiring an advanced electronic signature or an advanced electronic signature based on a qualified certificate in accordance with Article 27(1) and (2) of Regulation (EU) No 910/2014, shall recognise formats of advanced electronic signatures other than those referred to in Article 1 of this Regulation, where:
(a)
the Member State, in which the trust service provider used by the signatory is established, offers other Member States signature validation methods for those formats; and
(b)
those validation methods shall be carried out in accordance with paragraph 2.
2. The validation methods for alternative signature formats shall fulfil all the following conditions:
(a)
be, where possible, suitable for automated processing;
(b)
allow other Member States to validate the received electronic signature online, free of charge;
(c)
provide clear, comprehensive, easily understandable and accessible instructions to perform the validation;
(d)
be indicated in the signed document, in the electronic signature or in the electronic document container;
(e)
confirm the validity of an advanced electronic signature provided that:
—
the certificate supporting the advanced electronic signature was valid at the time of signing,
—
where the advanced electronic signature is supported by a qualified certificate, the qualified certificate supporting the advanced electronic signature was, at the time of signing, a qualified certificate for electronic signature in compliance with Annex I to Regulation (EU) No 910/2014 and issued by a qualified trust service provider,
—
the signature validation data corresponds to the data provided to the relying party,
—
the unique set of data representing the signatory is correctly provided to the relying party,
—
if a pseudonym was used at the time of signing, the use of any pseudonym is clearly indicated to the relying party,
—
where the advanced electronic signature is created by a qualified electronic signature creation device, the use of any such device is clearly indicated to the relying party,
—
the integrity of the signed data has not been compromised,
—
the requirements set out in Article 26 of Regulation (EU) No 910/2014 were met at the time of signing,
—
the system used for validating the advanced electronic signature provides to the relying party the correct result of the validation process and allows the relying party to detect any security relevant issues.
3. The indication referred to in paragraph 2, point (d) shall enable relying parties to easily access the complete specifications of the signature validation method, free of charge.
