Where do I enter my promo code? Jared Schwitzke September 22, 2017 20:28 Follow Promo codes are entered during Step 4 of the trip listing process. Related articles Where is Airmule available? Where can I find my confirmation code? How do I know what I'm transporting? Is Airmule only for US residents? What are the chances my trip will get matched with a shipment? Comments 0 comments Please sign in to leave a comment.