It's not clear that a warning would be allowed. In particular, the new paragraph 45(2a) prohibits mandatory checks on eIDAS certificates. Mozilla has proposed

It's not clear that a warning would be allowed. In particular, the new paragraph 45(2a) prohibits mandatory checks on eIDAS certificates. Mozilla has proposed text[1] that would make clear that the requirement is only to display identity information, but this text has not been adopted. [1] https://securityriskahead.eu/wp-content/uploads/2023/09/Mozilla-Statement-20230830.docx.pdf https://securityriskahead.eu/wp-content/uploads/2023/09/Mozi...