Notices required of the City under BC 4.05.010 through 4.05.045 shall be given by mailing the notice to the last known address of the person to be notified as shown on City records or the last available complete assessment roll in the office of the county assessor. The time when the notice is deposited in the mail in Beaverton, Oregon, shall be considered the time when the notice is given. Proof of giving notice may be made by the certificate of the person mailing the notice.