Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.A death claim letter format for bank is straightforward. Moreover, you just have to submit documents like a death certificate, ID proof, etc. Sample Letter – Asking for a debt write-off when someone is deceased. The procedure is very simple. Get the death certificate and legal heir certificate. Notify Bank of America. We'll ask you for the deceased customer's full legal name and Social Security number to identify their accounts. Please let me know if any other documents are required for claiming the amount of deceased.