So bring in a gas receipt, any receipt, it can be from a previous day or week. Take it in to any Jack in Box and you'll get 2 free tacos. In some people's books, this is a meal. Check out Jack talking about it here at the JIB's site.
Jack Feels Your (Gas) Pain!
Jack in the Box® Restaurants to Offer Two Free Tacos to Guests with Gas Receipt on June 26. Jack in the Box restaurants will give away two free tacos to guests who present a valid gas receipt. Limit of one order of tacos per guest. No purchase necessary. Duplicates or copies will not be accepted.