Bank Letter (A letter on bank letterhead that formally certifies the account owners routing and account numbers. Section 6: Authorization.This is a fillable PDF form. To complete the form, click in an area and type. Use the checkboxes in the "Records We Can Share" section of the form to select what we can share. Complete all address blanks that are not marked optional. Corporations are required to maintain a statutory agent at a valid address in the records of the. 1. Provide cardholder and payment information. Bank of America customer service information is designed to make your banking experience easy and efficient.