California Codes, Code of Civil Procedure - CCP, Part 2 — Of Civil Actions, Title 10 — Actions in Particular Cases, Chapter 4.6 — Actions Concerning Real Property Titles Affected by Public Improvement Assessments, Section 801.10
All unknown defendants, including the heirs and devisees designated in the complaint, shall have the same rights as are provided by law for other defendants upon whom summons is served, and the action shall proceed against them in the same manner. Regardless of any legal disability, any unknown defendant, including any heir or devisee designated in the complaint, who has been served, and anyone claiming under him, shall be concluded by a judgment in the action as if the action were brought against and personal service made upon that person by his or her name.
Notes
Establishes that unknown defendants, including designated heirs and devisees, have the same rights and are subject to the same process as other served defendants. Regardless of legal disability, a served unknown defendant and anyone claiming under that person are bound by the judgment as though the person had been named and personally served.
Use as reference
Lexinter.net | California Code, Code of Civil Procedure - CCP § 801.10 | https://laws.lexinter.net/codes/california/code-of-civil-procedure/part-2/title-10/chapter-4-6/section-801-10