To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. I would contact the bank and provide them with a death certificate along with proof of your relationship to the deceased.Notify Bank of America. We'll ask you for the deceased customer's full legal name and Social Security number to identify their accounts. My mother passed away. What do I do to close out bank account. You'll need the person's Social Security number and certified copies of their death certificate for most agencies and programs. Tower requires the following documentation in order to close the account: • Certified copy of the Death Certificate. Whenever appropriate, contact the probate court in the jurisdiction where the decedent resided, such as the Office of the Register of Wills in Maryland. 1. If you are a co-borrower, we will contact you to see if you would like to retain or close out the loan.