Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.This is to notify the bank that my. (Relationship with deceased). You'll need the person's Social Security number and certified copies of their death certificate for most agencies and programs. Social Security and Medicare. To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. Notify your loved one's financial institution(s) to retitle or distribute the account(s). To sum up, I want to inform you that my husband died in a car accident on 28th July 2022. Moreover, he has a savings bank account in your bank.