California Code, Streets and Highways Code - SHC § 5612

Notice to repair may be given by delivering a written notice personally to the owner or to the person in possession of the property facing upon the sidewalk so out of repair, or by mailing a postal card, postage prepaid, to the person in possession of such property, or to the owner thereof at his last known address as the same appears on the last equalized assessment rolls of such city or to the name and address of the person owning such property as shown in the records of the office of the clerk.