You can write a letter, sign it and hand it to a bank professional. They will accept the letter but, may still have you sign their form.Remove stop payment and restore ACH transaction. Instructions. Download PDF, fill out, and fax to 210.476. Contact your bank for a power of attorney form. The authorization form should be returned to the Texas Child Support Disbursement Unit (TXCSDU), P.O. Box. How do I sign up for Direct Deposit?