California Code, Health and Safety Code - HSC § 7738

A copy of the notice shall be mailed to every person who owns, holds, or has the right of interment in, any plot in the cemetery or part affected, whose name appears upon the records of the cemetery. The notice shall be addressed to the last known post-office address of the plot owner as it appears from the records of the cemetery, and if his address does not appear or is not known, then to him at the city, or city and county, in which the cemetery land is situated.