Legal recourse is possible if your ex-spouse refuses to sign the car over to you. If the divorce decree ordered the car to be signed over to you, your ex must abide by the decree. If they don't, you can ask the judge to hold your ex in contempt of court. In the event that the judge agrees to your request, the court can help you take possession of the vehicle, issue fines against your ex, or make sure your ex pays your attorney fees.