If a notice is required to be sent to the owner of a lot pursuant to this chapter, the notice shall be addressed to the owner or the owner’s agent, as such address is recorded in the county tax roll. If the address of the owner or of the owner’s agent is unknown to the recorder, the recorder shall mail the notice addressed to the owner or the owner’s agent at the address where the property is located. Any mistake, error, omission or failure in respect to a good faith mailing shall not be jurisdictional or invalidate the assessment proceeding, but there shall be no foreclosure or legal action to collect until notice has been given by personal service upon the property owner, or, if personal service cannot be had, then by publication once a week for two consecutive weeks in a newspaper of general circulation within the City.