Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.A death claim letter format for bank is straightforward. Moreover, you just have to submit documents like a death certificate, ID proof, etc. What do you write in a death notice? This is to inform you that (Full Name) died on (Month, Date, Year). Please send me the neces sary instructions to complete a claim under policy number(s). Sample Letter – Asking for a debt write-off when someone is deceased.