My Aunt(age62years) was taken a hand loan amount of 3 lakhs from her friend in the year 2014 for that she gave a empty promissory note with signature only and my Aunt returened an amount of 3 lakhs in 2016 after selling agriculture land by cash and she is not taken a promissory note and her friend said she kept somewhere and need to find out. With the trust of her friend my Aunt ignored the promissory note. And my aunt was expired on jul2019. After six months her friend send a legal notice through some local financer saying my aunt taken an amount of 6 lakhs on jul 2018. And now they are seeking for property attachment but that property is already on mortgage.
We are struggle to pay mortgage amount on top of that they are taking advantage of blank pro note signed by my aunt.
1)How do we prove that they filled the empty pro note and how do we save our property?
2) As we know they filled up the pronote amount as 6lakhs and interst as of the date filing jan2020 is 3lakhs. So if they is no way we can prove it is filled document will court ask us to pay the principal+intrest till the time of case closing?