(A) The notice shall be served at least 20 days before the date of hearing in the following manner:
(1) If the person to whom it is addressed resides in the city, or can readily be found therein, it shall be served personally on the addressee or left at his or her residence with a person of suitable age and discretion;
(2) Addressees not served personally shall be served by certified mail at their addresses appearing in records of the county; and
(3) By publication of the notice once in the official newspaper at least ten days prior to the date of hearing.
(B) Inadvertent failure to serve any addressee personally or by certified mail shall not invalidate the proceedings, but publication shall then suffice.
(1989 Code, § 10.32, Subd. 4)