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). In New York State, the Surrogate's Court decides what happens to a person's property when that person dies. You'll receive an email within 24 hours explaining what documents are needed to complete your claim. Typically, we require: A copy of the death certificate. You should also make a list of what the Decedent owned at the time of death (such as bank accounts, house, stocks, etc.). Give application to the bank or treasury as the case may be informing passing away of the Pensioner. Start the letter with your introduction and the reason for writing the letter.