Sign it and date it. There's no special format so long as who you are and the purpose of the letter is clear.The death claim letter should be written in the formal letter format. Check the samples provided below for your reference. A death claim letter is an official letter to the bank. Notify Bank of America. We'll ask you for the deceased customer's full legal name and Social Security number to identify their accounts. Send that to the County Clerk where the deceased died. Customer. I do have a complicated situation and trying to find a way around the executor. This document provides instructions for a scam known as the "Next of Kin" or "N.