How can son of accused get back bail amount after death of accused?

My father was accused in defamation case (section 499500 of IPC. We had paid amount of Rs. 7000 in cash to court as bail bond amount. Now the case is abated as my father has died and the court has issued an order for abatement of case. When I (son of accused) made an application to the court for refund of that bail bond amount to me as legal heir, the court asked for succession certificate. I had given other documents like Aadhar card of both me and father, my passport, ration card which proves that I am son. But the court is insisting on succession certificate. 1. Is the court correct in asking for succession certificate for such a relatively small amount (I had given other general proofs)? 2. When bail bond is paid initially, why does the court not take name of the nominee (like done by bank for FD etc.)? Then on death of accused, the court can refund the money to nominee! It is not practical for me get succession certificate as I live in another city and the amount is small.