NRS 39.020: Interests of all parties must be set forth in complaint.

The interests of all persons in the property, whether such persons be known or unknown, shall be set forth in the complaint specifically and particularly, as far as known to the plaintiff; and if one or more of the parties, or the share or quantity of interest of any of the parties, be unknown to the plaintiff, or be uncertain or contingent, or the ownership of the inheritance depend upon an executory devise, or the remainder be a contingent remainder, so that such parties cannot be named, that fact shall be set forth in the complaint.