ICICI Bank — Icici bajaj scooter bond series II

I am Dhruv writing on behalf of my father
My grandfather purchased icici bajaj scooter bond series II and now the bonds have been redeemed and we have also received the cheque of the redemption amount but my grandfather died in 2016 and because the cheque is on his name we are not able to claim the money please tell us how de we proceed so that we can receive our money.