Asume Death Certificate under Sec 107/108

Iam Deepak Patwal. From Dilshad Garden, Delhi 110095. I Work as an Executive in a BPO. I Have a family of 3 including my mother and a younger sister who is a student and just completed grad. My concern today is that my father G.S Patwal who used to work in state bank of india as a cashier. Went missing on date of 6th oct 2006 while he was on way to office. We have already asked in the office but they say he did not came to the office at all. So we searched the clues for him as much we can and after 24 hrs. We filed a missing report at the local police station. Since its almost over 10 yrs there is no single clue about him dead/alive. When we go to the bank for the insuarance and personal fund amount of my father they say first they require a documented proof stating this person dead legaly. At this moment ive done lot of things in civil court,in police station. Still no document to provide to the bank. Please help me with a suggestion or advice so i can get this work done soon. Thank you. Deepak Patwal