Section 3953 Of Chapter 10. Rights Of Purchaser Of Tax-deeded Property, Or Any Other Person Claiming Through Him, To Bring Action To Determine Adverse Claims To Or Clouds Upon Tax-deeded Property Purchased From The State From California Revenue And Taxation Code >> Division 1. >> Part 6. >> Chapter 10.

. All unknown defendants, except unknown defendants owning a special assessment, shall be described in the complaint, as follows: "Also all other persons unknown, claiming any right, title, estate, lien or interest in the real property described in the complaint, adverse to plaintiff's ownership or any cloud upon plaintiff's title thereto."