rebut the presumption that the cheque had been issued for payment of a debt or in discharge of a liability. It is immaterial that the cheque may have been filled in by any person other than the drawer, if the cheque is duly signed by the drawer. If the cheque is otherwise valid, the penal provisions of Section 138 would be attracted. If a signed blank cheque is voluntarily presented to a payee, towards some payment, the payee may fill up the amount and other particulars. This in itself would not invalidate the cheque. The onus would still be on the accused to prove that the cheque was not in discharge of a debt or liability by adducing evidence. It is not the case of the respondent-accused that he either signed the cheque or parted with it under any threat or coercion. Nor is it the case of the respondent-accused that the unfilled signed cheque had been stolen. The existence of a fiduciary relationship between the payee of a cheque and its drawer, would not disentitle the payee to the benefit of the presumption under Section 139 of the Negotiable Instruments Act, in the absence of evidence of exercise of undue influence or coercion. The second question is also answered in the negative. Even a blank cheque leaf, voluntarily signed and handed over by the accused, which is towards some payment, would attract presumption under Section 139 of the Negotiable Instruments Act, in the absence of any cogent evidence to show that the cheque was not issued in discharge of a debt.”