Unfamiliar party filing counter claim case in another state.

My father is a central government employee who died in service recently this April.Now we are three members mother, younger brother and myself. At the time of funeral many of my father's colleagues warned us regarding a exorbitant money lenders who are being government employees usually sue for money from deseased employees family simply in order to make money at the time of all their settlements. As the family don't aware whether true about these debt either they settle or defend. Even if they defend in court the money lenders in any manner will produce a false document. Like that it is happening in our scenario. We are living in chennai and we received a RP from Nellore court Andhra pradesh in the name of an unknown person. Later when we verified with my father's office they said that it is the name of one of the exorbitant money lender. What shall we do? Being a central government employees they should not do lending business and move the documents in the name of their binamees .Shall I send a complaint to vigilance cell and PM Portal.?pls kindly advise us as soon as possible, we are very much in distress.