The judgment shall be conclusive with respect to land boundaries upon every entity who at the commencement of the action had or claimed an estate, right, title or interest in or to or lien upon a part of the entire area of real property described in the complaint as intended to be affected by the action, and upon every entity claiming under any such person by title subsequent to the commencement of the action.
Source:
Section 751.62, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CCP§ionNum=751.62..