Auto-Draft allows customers to have their NBU bill automatically paid from a checking or savings account on the due date each month. Not only is it convenient, but also allows you to save time and money on postage and gas! You still receive a bill prior to the next draft, which notifies you of the exact amount of the draft. If you would like to sign up for Auto-Draft, you will need to contact NBU at least 7 business days before the next due date of your next bill to enroll. You can call Customer Service at (830) 629-8400 or come in to our downtown office located at 263 E Main Plaza to fill out an application.