Code of Professional Responsibility and Accountability (CPRA)
Section 28. Filing and service. - The filing and the service of papers or notices required by this Canon shall be made with the Commission, or upon the parties personally, by registered mail, accredited courier, electronic mail or other electronic means, or as provided for in international conventions to which the Philippines is a party. For this purpose, the office address and the electronic mail address supplied by the lawyer to the IBP shall be the official addresses to which all notices, orders and processes shall be served. Proof of filing and service shall be submitted in accordance with the Rules of Civil Procedure, as amended.