claim in the correspondence it had with the 2nd defendant Insurance Company that Rs.50/- towards the premium was paid to cover the risk of the 1st account holder. However, what is the basis for such claim said to have been made by the Bank is not forthcoming. The averments and the claims in the inter se correspondence between the defendants, if any, is not binding on the plaintiff and hence the contentions of the defendants that the charges were paid only respect of the plaintiff and not her husband, who is a joint account holder, cannot be countenanced more particularly, when there is no material brought on record to substantiate the alleged defence that the debit entry in regard to Rs.50/- showing deduction towards the insurance charges specifically indicates that it is intended to cover the risk of the first account holder between the joint account holders. Further, it appears that a number of letters were exchanged between the 1st defendant Bank and the 2nd defendant insurance company; and the dates of such letters exchanged are also stated in the written statement of the 2nd defendant and it is pleaded that the said correspondence be read as part of the defence of the 2nd defendantinsurance company. However, none of those documents were exhibited for the reasons best known to the 1st defendant Bank and the 2nd defendant insurance company. As rightly contended by the learned counsel for the appellant/ plaintiff, the non filing and marking of the said documents (correspondence), if any, is fatal to the defence of the defendants. And, an adverse inference has to be necessarily drawn against the defendants for not filing the correspondence, which is material evidence, even according to the defence of the defendants and it is trite to presume that the evidence, which could be and is not produced, would, if produced, be unfavorable to the defendants who had withheld it. In the facts and circumstances in the absence of any evidence to accept the contention that the premium/charges of Rs.50/- admittedly paid are in respect of the plaintiff and not her deceased husband, there is a possibility, plausibility and high probability to take a view that the said charges were in fact paid to cover the risk of the other joint account holder, i.e., the late husband of the plaintiff, as rightly urged by the learned counsel for the plaintiff. As such a view is possible and probable, it