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). Start the letter with your introduction and the reason for writing the letter. Send the completed form to your local SSA office. Please give pages 2 and 3 of this form to any survivors of the deceased. Discover the precise steps to secure Letters of Testamentary in California. Last Name of Next of Kin,. Q: What information should be included in the letter?