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. Gather your documents. What happens to American Express Savings accounts after an Account holder's death? The Bank requires certain documents depending on your specific circumstances. Here you can check the lists of all the documents and information needed after someone dies. They will help you tell the required people and organisations. Settling a Capital One account after someone has passed away. Our goal is to make our processes clear so that you know what to expect.