Ration card electricity bill are not treated as sufficient document for establishment of title in the property. If any person has been on the property for many years and treat it as his own property and owner never oppose it then such person has accrued interest in the property and title on the property on adverse possession. Adverse possesion is good ground to establish interest in the priperty and it is admisiable in the court. In your case being in possession over the priperty is relevant fact but only ration card is not sufficient document to prove ownership.