A death claim application letter for a bank is basically a letter to the bank stating that the account holder has been deceased. Start the letter with your introduction and the reason for writing the letter.The sender's and the receiver's addresses should be mentioned in the death claim letter format for bank properly. This is to notify the bank that my. (Relationship with deceased). DEATH OF THE SOLE UNIT HOLDER-. Death claim covering letter - Free download as PDF File (. Proof of death of depositor i.e. Life insurance, death benefits or other property that pass directly to the beneficiaries. The debts or mortgages of the Decedent.