532

Any person having a lien subsequent to the plaintiff upon the same property or any part thereof, or who has given a promissory note or other personal obligation for the payment of the debt or any part thereof, secured by the mortgage or other lien which is the subject of the action, shall be made a defendant in the action. Any person having a prior lien may be made defendant at the option of the plaintiff, or by the order of the court when deemed necessary.