1) it is well settled law that once the applicant having accepted the full and final payment is estopped from raising the dispute even as per original contract which stood discharged and, therefore, no aribtrable issue is involved
2) Once there is a full and final settlement in respect of any particular dispute or difference in relation to a matter covered under the arbitration clause in the contract and that dispute or difference is finally settled by and between the parties, such a dispute or difference does not remain to be an arbitrable dispute and the arbitration clause cannot be invoked even though for certain other matters, the contract may be in subsistence. Once the parties have arrived at a settlement in respect of any dispute or difference arising under a contract and that dispute or the difference is amicably settled by way of a final settlement by and between the parties, unless that settlement is set aside in proper proceedings, it cannot lie in the mouth of one of the parties to the settlement to spurn it on the ground that it was a mistake and to proceed to invoke the arbitration clause. If this is permitted the sanctity of contract, the settlement also being a contract, would be wholly lost and it would be open to one party to take the benefit under the settlement and then to question the same on the ground of mistake without having the settlement set aside.
3) arbitration clause in settlement agreement will be applicable only to settlement agreement clause s and not towards unpaid claims