The present article is devoted to a topical issue of notarial and corporate law, concerning allowability of optional participation of a notary in the in the certification of the decision of the governmental body of the public joint stock company upon the certification of the decision by a registrar of securities. Despite the obviousness of the issue, for Russian practice, due to the lack of legal regulation, it remains unresolved. In this article, the author analyzes the reasons and purposes of enacting legislation on notarial confirmation of decisions. The author considers the issue of allowability of optional participation of a notary both from the point of the notary legislation and the civil legislation, justifying not only the potential usefulness of the legal institution, but also its permissibility within the framework of the current legislation.