N.D. Cent. Code § 32-09.1-13: Third party may intervene

If it appears that any person not a party to the action has or claims an interest in any of the garnished property antedating the garnishment, the court may permit that person to appear and maintain that person's rights. If the person does not appear, the court may direct that the person be notified to appear or be barred of the claim. The notice may be served in a manner as the court directs, and the person appearing or notified shall be joined as a party and is bound by judgment against the garnishee.