To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. This comprehensive guide aims to help you unravel the complexities of using a Small Estate Affidavit in Illinois.The best way to avoid any issues with accessing the bank accounts of deceased family members is to have a clear and up-to-date estate plan in place. You still control all the money in the account—your POD beneficiary has no rights to the money, and you can spend it all if you want. The best way to avoid any issues with accessing the bank accounts of deceased family members is to have a clear and up-to-date estate plan in place. "My dad died and I'm executor in the Will. Any one joint tenant may withdraw all or a part of the funds in a joint bank account.