At least 30 days before he applies for a deed, the purchaser or his assignee shall serve upon the owner of the property, and upon the occupant of such property if it is occupied, a written notice setting forth:
If the owner cannot be found, after due diligence, the notice shall be posted in a conspicuous place upon the property, at least 30 days before the time stated therein as the time at which the application for a deed will be made.
Ca. Sts. and High. Code § 10418