The action shall be commenced by the filing of a verified complaint. The party commencing the action shall be named as plaintiff, and the defendants shall be described as “all persons claiming any interest in, or lien upon, the real property herein described, or any part thereof.” The complaint shall contain a statement of the facts enumerated in Section 751.02, a particular description of the real property, and a specification of the estate, title, or interest of the plaintiff in the property.
Source:
Section 751.04, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CCP§ionNum=751.04..