Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.Sample Letter – Asking for a debt write-off when someone is deceased. This is to notify the bank that my. (Relationship with deceased). Notify Bank of America. We'll ask you for the deceased customer's full legal name and Social Security number to identify their accounts. To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. Use this letter when someone you know has died and they have left no assets or will behind. Contact us for advice before using this letter.