1. You need a demat account. Does not matter where you will need a demay account in his name.
2. You will then need to fill a dematerialisation form with details from the physical share certificate.
3. You will need to verify the signature on the dematerialisation form with the record at global ime capital (global ime capital oversees global ime bank’s shares)
4. You will then submit the verified form and the physical certificate at the institution where you opened the demat account.