North Dakota Century Code Title 32. Judicial Remedies § 32-17-06. Who joined as unknown persons

All persons having or claiming an estate or interest in, or lien or encumbrance upon, the property described in the complaint, whether as heirs, devisees, legatees, or personal representative of a deceased person, or under any other title or interest, and not in possession, nor appearing of record in the office of the recorder, the clerk of the district court, or the county auditor of the county in which the land is situated, to have such claim, title, or interest therein, may be proceeded against as persons unknown, and any order, judgment, or decree entered in the action shall be valid and binding on such unknown persons whether of age or minors, and on those claiming under them.