Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format.A valid governmentissued ID. The death certificate of the account holder. The account owner's social security number. This is to notify the bank that my. (Relationship with deceased). Banks do not need an original death certificate. One thing for sure is that the bank will want to know the specific reasons for the removal request as the next-to-kin.