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. Notify a third party about a person's death. Start the letter with your introduction and the reason for writing the letter. Tell us about a bereavement. At ANZ we'll guide you through the deceased estate process and work with you to settle any accounts. The first step is to notify us. You will need the death certificate to do this. In order to take action on the estate, you'll need to complete our bereavement form.