I would double check this with an attorney in your area but I believe that an order of Non-Suit is a voluntary dismissal by the plaintiff of their action.  Some of the counties have a standard order that can be filled out and filed with the court regarding the matter. The order is generally "without prejudice" to the plaintiff so that they may refile the case.  It may be that they filed suit under the wrong theory of law or against the wrong parties and they would like to discontinue the action without it going to far or being held against them.  If you are the defendant you need to be on guard for a new suit filed or you need to understand the reasons behind the filing.  Get some help here.  Good luck.