(Arizona Revised Statutes, Section 14-3971)You would simply get the form and instructions from the court's website, fill out the form and have it notarized. You must do the following: 1.Complete the Closing Statement: See the form called Instructions: How to fill out the Closing. Statement. 2. To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. (Check all boxes that apply.) I am named in the Will of the person who died, a copy of which is attached to this Affidavit. To close a bank account after death, you must completely liquidate its funds. Find an operating agreement online. Fill it out for the deceased, but don't forge the name. A. Petition for Approval of Accounting: Prior to closing the case, you may file a Petition to ask the court to approve how the estate was managed. Question: My mother passed away.