To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. You should produce the concerned Bank branch the death certificate from municipal authority as proof of that persons demise.The letters cite reasons for closure such as relocating, no longer needing the account, job changes, and death of an account holder. You have to write an application to the bank. The first and foremost thing you must do to close a bank account upon the death of a loved one is to inform the bank of this death. Welcome to Cadence Bank. Claiming a Property. Searching on these fields will assist you in locating unclaimed property and initiating a claim. A poem, in two books. Explore careers at Costco.