Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.Start the letter with your introduction and the reason for writing the letter. Sample Letter – Asking for a debt write-off when someone is deceased. I need to write to several organisations including banks, insurance and mortgager company to inform them of my partners death. Use this letter when someone you know has died and they have left no assets or will behind. Contact us for advice before using this letter. City Administrator Brian Koral explained the need for this addition to the City Code. Alderman Milner moved to accept first reading and place Bill. Send a letter that includes the following: Decedent's name, date of death and Coroner's file number (if known).