2 It is the case of the plaintiffs that the parties entered into an MOU titled ‘Deed of Surrender’ dated 18.03.2003 where the understanding of the parties was written. The defendants paid various amounts from time to time and according to the plaintiffs, a sum of Rs.79,36,700/- is due and payable as principal amount to the plaintiffs. It is the case of the plaintiffs that the defendants were, every year issuing confirmation letter for income tax purposes and had issued six such confirmation letters dated 1.04.2003, 1.4.2004, 1.4.2006, 1.4.2008, 1.4.2010 and 1.4.2011. As per the confirmation letter dated 1.4.2011, the plaintiffs alleged that the defendants have admitted a closing balance of Rs.79,36,700/- as on 31.03.2011 due and payable to the plaintiffs. The plaintiffs have filed this suit under Order 37 of Code of Civil Procedure, 1908 based on the Deed of Surrender dated 18.03.2003 read with confirmation letters which are at Exhs. 'D' to 'I' to the plaint. It is the case of the plaintiffs that the defendants have no defence tto the claim. The plaintiffs have, of course, also claimed interest at 18% p.a. on the amount of Rs.79,36,700/-.