Service of a paper, other than a process, may be made upon the sheriff by delivering it to the sheriff, to one of the sheriff's deputies, or to a person in charge of the office during office hours, or, if no such person is there, by leaving it in a conspicuous place in the office.
N.D. Cent. Code § 11-15-21
Service of papers other than process on sheriff
Official source: North Dakota Legislative Branch. Reproduced from public-domain North Dakota statutes; confirm against the official source for the current text. Not legal advice.