Promissory note

The answer to that would be none, that is there can be no upper limit to the amount mentioned(to be paid) in a promissory note.

Note, the only bar relating to it is the limitation period of three years from the date of its execution (i.e. the period within which the creditor can bring an action in the local civil court to enforce payment in the said promissory note.)

My Father expired on 10/05/2016 a person came Home saying that he holds 6no.of signed by my father (empty promissory notes) n repay Rs 15Lakhs harrasing us using abbusive language, hence I lodged a complaint in near by police station recently the so called person sent a legal notice to me n to my mother showing only one promissory note of Rs 15Lakhs n the rest of 5 empty notes he is trying to set a false people to take hold on my father's property ( a house n a open plot ) after having attachment he is planning to fly U.S.for few months My question is how can I regain or stop the empty promissory notes from the person n we all family members are depended on my father's income n no other alternative sources are available, Kindly suggest me the best way to slolve the issue either legally or through any other genuine procedure

The burden will be upon the person who served you notice to prove in the court that he had paid 15 lakhs worth of rupees to your father, for which he will have to offer several proofs for court's inspection including mode of such payment, his source of income (out of which he managed to make such payment,) the reason for advancing such payment to your father etc. I'd advise you to get in touch with a local advocate so he can assist you smoothly through all the proceedings in this false promissory note case. 

As such No limit on upper limit..

He cannot take law into his hands. The property could be attached through due process of law only. In order to pre-empt any ex-party interim order or injunctioon, you may file a caveat in the jurisdictional court. 

Sorry for the late reply but Thanks to all for the kind concern