Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.I need to write to several organisations including banks, insurance and mortgager company to inform them of my partners death. The procedure is very simple. Get the death certificate and legal heir certificate. Start the letter with your introduction and the reason for writing the letter. 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 sum up, I want to inform you that my husband died in a car accident on 28th July 2022. Moreover, he has a savings bank account in your bank.