3) Attach a bank reference letter. Two authorized signatures required.Contact your bank for a power of attorney form. Signature of Bank Representative. Print Bank Representative Name. If you need to show someone your bank balance, you simply give them a copy of your last bank statement. Mail your completed Direct Deposit Authorization form to: CalSTRS, P.O. Box 15275, MS 85, Sacramento, CA 95851-0275 or fax to 916-414-5474. To verify a residential address for opening a new account, please complete this form. This form must be notarized. The first step in using an ACH authorization form is to request this form from your bank or financial institution.