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.An Affidavit of Death is used to close accounts, receive benefits, or take ownership of property, real estate, or securities. After someone dies, notify the government programs and businesses they used. Cancel benefits payments and close or transfer accounts. In most instances, close these accounts and consolidate them into the estate's bank account. Consider whether ancillary administration is necessary. The bank may require a certified death certificate in order to close the account and distribute the funds. For example, most financial institutions will require you to present a Letter of Administration before granting access to a deceased person's bank account. For example, let's say 20 years after the deceased's death, the personal representative discovers a previously unknown bank account.