Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.You'll need the person's Social Security number and certified copies of their death certificate for most agencies and programs. Social Security and Medicare. Closing a bank account when someone passes away isn't difficult, as long as you have the right paperwork for the the teller or banker. This is to notify the bank that my. (Relationship with deceased). Use our affidavit of death form to verify the death of a family member and help with the inheritance process. First, I'm so sorry to hear about your wife's death—this can be very, very painful and difficult (I know, I lost my wife as well). To sum up, I want to inform you that my husband died in a car accident on 28th July 2022.