Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.For the deceased's bank account, the account number and exact dollar amount in the account must be provided. This is to notify the bank that my. (Relationship with deceased). When it comes to handling the decedent's bank accounts, we're here to make the process as simple and straightforward as possible. You have to write an application to the bank. Give application to the bank or treasury as the case may be informing passing away of the Pensioner. Sample Letter – Asking for a debt write-off when someone is deceased. The forms can be downloaded from the website and saved to your local computer.