It is difficult to respond appropriately because of the lack of important information - particularly, what is the subject of the prior court order/decision that he is looking to "vacate". I am going to presume that an order/judgment of default was issued against him for not timely serving an Answer to a summons and complaint that was served upon him. If that is the case, and the court denied his motion to vacate/set aside, then he is faced with the legal and financial impact of the original order (ie- he has to pay the judgment, if a monetary amount was assessed). He could appeal, trying to argue that the court's denial of his motion to vacate is erroneous as a matter of fact and law; and even submit a motion to "reargue"; or do both at the same time. But, as a whole, these are very complicated and technical procedures and steps so he is best serving himself if he consults with and retains a lawyer to perform these steps- probably something he shoudl have done when first served with the legal process. Good Luck.