Cal. Code of Civil Procedure § 11 : California Code Of Civil Procedure — Preliminary Provisions — Notice or communication required to be mailed by registered mail Date: 1 Aug 2016 TEXT PDF Current through the 2016 Legislative Session Wherever any notice or other communication is required by this code to be mailed by registered mail by or to any person or corporation, the mailing of such notice or other communication by certified mail shall be deemed to be a sufficient compliance with the requirements of law. Ca. Civ. Proc. Code § 11