CA Civ Proc Code Section 1250.125

(a)

Where summons is served by publication, the publication may name only the defendants to be served thereby and describe only the property in which the defendants to be served thereby have or claim interests.

(b)

Judgment based on failure to appear and answer following service under this section shall be conclusive against the defendants named in respect only to property described in the publication.

(c)

Notwithstanding subdivision (b), a defendant who did not receive the offer required by Section 7267.2 of the Government Code because the owner could not be located with reasonable diligence, who was served by publication, and who failed to appear, may contest the amount of compensation within one year of the judgment and for good cause shown, whereupon that issue shall be litigated according to the provisions of this title.