Article R138-1 of the French Intellectual Property Code
The objection referred to in article L. 138-4 shall be notified by registered letter with acknowledgement of receipt or by any other means that provides proof of the date of receipt and the identity of the addressee, including by electronic means. No reasons need to be given for the objection. In support of his objection, the author must produce a copy of an identity document and a declaration on his…