When you register a new account online at Whataburger, you will receive a FREE Burger. No expenditure is required. One offer is permitted per customer. Register/Join right away to open a new account. After logging in, navigate to My Offers and select “Redeem Offer” from the menu. It will become free once you place one Whataburger in your shopping cart and the discount is applied. It could take up to 24 hours to show up.