California Codes, Code of Civil Procedure - CCP, Part 2 — Of Civil Actions, Title 6 — Of the Pleadings in Civil Actions, Chapter 1 — The Pleadings in General, Section 422.40
In the complaint, the title of the action shall include the names of all the parties; but, except as otherwise provided by statute or rule of the Judicial Council, in other pleadings it is sufficient to state the name of the first party on each side with an appropriate indication of other parties.
Notes
Requires a complaint’s action title to name all parties to the case. Allows other pleadings, unless a statute or Judicial Council rule provides otherwise, to use only the first party’s name on each side with an appropriate indication that additional parties exist in the action.
Use as reference
Lexinter.net | California Code, Code of Civil Procedure - CCP § 422.40 | https://laws.lexinter.net/codes/california/code-of-civil-procedure/part-2/title-6/chapter-1/section-422-40