To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. Most banks will have their own individual procedure for closing a bank account after the title holder of the account passes away.You have to write an application to the bank. The letters cite reasons for closure such as relocating, no longer needing the account, job changes, and death of an account holder. To close your bank account, you must write an application letter to the manager of your respective bank branch. Here is a checklist of important things to do when someone close to you dies in Washington State. Notify Bank of America. We'll ask you for the deceased customer's full legal name and Social Security number to identify their accounts.