If a personal representative of the estate of the deceased owner has been appointed in the county where the real estate is situated, the notice before foreclosure must be served upon the personal representative. Service may be made by registered mail, as provided in rule 4 of the North Dakota Rules of Civil Procedure, addressed to the personal representative's post-office address as shown by the records of the district court by which the personal representative was appointed.
N.D.C.C. § 32-19-24