The mortge was executed in 1945, the mortgagor was retain the possession of the property so for. and not delevered the possession to the mortgagees. The mortgage was executed by the grand father of the applicant. The possession was retained by the mortgagor and applicant's father was mortgage the same property to the village co-operative society in 1964.
The mortgagee's legal heirs was file the suit for injuction and same was set aside.
To proove the mortgage is null and void what are the laws and rule can be considered???