You should produce the concerned Bank branch the death certificate from municipal authority as proof of that persons demise. The letter shall start with the sender's address, date, bank's address, and with a salutation.A death claim letter format for bank is straightforward. Moreover, you just have to submit documents like a death certificate, ID proof, etc. To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. The first step is to notify the bank about the account holder's death, providing a copy of the death certificate. To close a bank account after death, you must completely liquidate its funds. In the case of joint account.