66.—(1) Where a claim is for the payment of the balance of an account, or for part of a sum alleged to be due and the remainder of it has been abandoned in order to bring the claim within the jurisdiction of a court of summary jurisdiction, a decree for recovery of the sum claimed or part of it or of dismissal shall, subject to the right of any party to appeal under Part XII, be a full discharge of all demands in respect of the account for the balance of which proceedings were bought or for the whole of the claim as the case may be.
(2) In this Article “claim” includes a set-off or counterclaim.