In addition to the matters required to be set forth in the affidavit by the plaintiff for publication of summons, it shall appear by the affidavit that the plaintiff used reasonable diligence to ascertain the identity and residence of the unknown defendants and of any persons sued as heirs and devisees.
Cal. Civ. Proc. Code § 801.9
Actions Concerning Real Property Titles Affected by Public Improvement Assessments
Amended by Stats. 1969, Ch. 1611.
Official source: California Legislative Information. Reproduced from public-domain California statutes; confirm against the official source for the current text. Not legal advice.