How Do Bank Closure Letters Work? To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account.A. Accounts must be filed with the Commissioner of Accounts. Make sure bank accounts earn interest if possible and have low or no fees. Review bank and other financial statements promptly. Notify the bank of your intention to close the account and provide a certified copy of the power of attorney document. What you may need ; Trust. Accounts with arrangements to hold the assets in a trust. This manual is intended to assist persons who are involved in the administration of a decedent's estate in Virginia. Institutions such as banks or trust companies may serve if authorized to conduct trust business in Virginia.