16.1. But, the appellants/defendants denied the said error crypt in the agreement. The defendants have not examined any witnesses in respect of the transactions of amount through sale agreement. In general, at the time of execution of agreement, a copy of agreement also would be given to other side. In this case, the appellants/defendants have not produced the copy of the agreement. Already, the plaintiffs have also issued a notice to the defendants. In the notice also, they stated about the advance amount received by the defendants and the defendants have not issued any reply. It is true, in the agreement there is an alteration but no initial was made by the parties. Normally, while writing in the agreement, if any alteration, then it would be mentioned in the document itself. In this case, there is no any such mentioning about the alleged typographical error. However, only because of that the typographical error, it cannot be said that it is a material alteration. Though the defendants have also stated in the written statement, subsequently, they stated that they only received a sum of Rs.6 lakhs and in the agreement, the words altered as Rs.7 lakhs. But, the defendants once pleaded that there is a material alteration, then it is their duty to establish that they only received Rs.6 lakhs and not received Rs.7 lakhs by examining any