Proof of death, such as certified copies of the death certificate. The letters cite reasons for closure such as relocating, no longer needing the account, job changes, and death of an account holder.The first and foremost thing you must do to close a bank account upon the death of a loved one is to inform the bank of this death. This article will give you the reasons why you should close your bank account. Sample account closing letters are also given for your better understanding. Most banks will have their own individual procedure for closing a bank account after the title holder of the account passes away. Enclosed with this letter are the death certificate and my legal authorization as the executor.