Code of Civil Procedure CCP § 1014

A defendant appears in an action when the defendant answers, demurs, files a notice of motion to strike, files a notice of motion to transfer pursuant to Section 396b , moves for reclassification pursuant to Section 403.040 , gives the plaintiff written notice of appearance, or when an attorney gives notice of appearance for the defendant.  After appearance, a defendant or the defendant’s attorney is entitled to notice of all subsequent proceedings of which notice is required to be given.  Where a defendant has not appeared, service of notice or papers need not be made upon the defendant.