Promissory notes and legal heirs

If you suspect the signatures to have been forged then you can file a petition before the trial court to send the papers to forensic department for expert's opinion towards the genuineness of the signature.

It is a matter of trial proceedings hence you discuss with your advocate about the strategies to be adopted to challenge the case.

Thanks a lot for the reply. If the signatures come to be true, whether my brother's wife is liable to pay by selling the house(which is in the name of my brother), property that has been asked to attach for clearing the debts.

Yes,your deceased brother's legal heirs are liable to repay the loan amount .

Well advised by experts, I agree.

LRs of deceased borrower are liable to repay the amount of promissory note(s).

However, if signature of your brother are (actually or suspected) to be forged, besides filing application before Trial (same) Court, file a criminal complaint through your lawyer. 

Thanks a lot for replies.