Res judicata (RJ) or res iudicata, also known as claim preclusion, is the Latin term for matter decided and refers to either of two concepts in both civil law and common law legal systems: a case in which there has been a final judgment and that is no longer subject to appeal; and the legal doctrine meant to bar (or preclude) relitigation of a claim between the same parties. In the case of res judicata, the matter cannot be raised again, either in the same court or in a different court. A court will use res judicata to deny reconsideration of a matter. The doctrine of res judicata is a method of preventing injustice to the parties of a case supposedly finished but perhaps also or mostly a way of avoiding unnecessary waste of judicial resources. Res judicata does not merely prevent future judgments from contradicting earlier ones, but also prevents litigants from multiplying judgments, and confusion. In common law jurisdictions, the principle of res judicata may be asserted either by a judge or a defendant. Once a final judgment has been handed down in a lawsuit, subsequent judges who are confronted with a suit that is identical to or substantially the same as the earlier one will apply the res judicata doctrine to preserve the effect of the first judgment. A defendant in a lawsuit may use res judicata as defense. The general rule is that a plaintiff who prosecuted an action against a defendant and obtained a valid final judgment is not able to initiate another action against the same defendant where: the claim is based on the same transaction that was at issue in the first action; the plaintiff seeks a different remedy, or further remedy, than was obtained in the first action; the claim is of such nature as could have been joined in the first action. Once a bankruptcy plan is confirmed in court action, the plan is binding on all parties involved. Any question regarding the plan which could have been raised but was not may be barred by res judicata.