Although it's not all that common, there are times when a person who has been involved in a car accident is placed in a position in which they decide to file a car accident counter claim. A counterclaim is a claim filed by the defendant disputing the claim of the plaintiff. It further asks for relief from the plaintiff on behalf of the defendant. If you have been involved in a car accident and the other driver (The plaintiff) has filed a claim against you (The defendant) you have the right to file a counterclaim against the other driver. There is no guarantee that you will win your car accident counter claim, but you have the legal right to file one.