Defendant unreasonably defending after notice of no personal claim to pay costs

In case of a defendant, against whom no personal claim is made, the plaintiff may deliver to such defendant with the summons, a notice subscribed by the plaintiff or his attorney, setting forth the general object of the action, a brief description of the property affected by it, if it affects real or personal property, and that no personal claim is made against such defendant. If a defendant on whom such notice is served unreasonably defends the action, he shall pay costs to the plaintiff.