Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.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. What do you write in a death notice? I need to write to several organisations including banks, insurance and mortgager company to inform them of my partners death.