Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.This is to notify the bank that my. (Relationship with deceased). Death Notification Form. Please accept our condolences. Notify a third party about a person's death. No letters of office are now outstanding on the decedent's estate, and no petition for letters is contemplated or pending in Illinois or in. The affidavit is often coupled with a copy of the death certificate. The affidavit can then be used to complete the distribution of property.