who is the owner of the property,is your father alone or your mother is a coowner.as far as loan amount is concerned if the bank has given higher loan as to value of your property it is there risk and they acn definetly attache your property since your father is surety.kindly note that all these recovery proceeding are initiated in Debt Recovery Tribunal ,which is a corrupt department,we hardly see any justice from this and the party has to finally go the high court for justice,it is advised kindly hire a advocate who is practising i specifically in DRT your your region and try to settle with Recovery Officer as they are in position to ........