This is to notify the bank that my. (Relationship with deceased).Sample Letter to Bank Informing the Death of the Account Holder. The death claim letter should be written in the formal letter format. To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. My dad passed away two months ago. Got the death certificate in hand and went to the bank to close his account. Government agencies and programs to notify of a death. In this video, we discuss an important aspect of estate planning: how to prevent your bank accounts from being frozen at the time of your death. My dad passed away two months ago.