Like the expiry date, DoorDash promo code guidelines also state the eligibility criteria. These instructions define the conditions under which a user can apply the code. So read them carefully and ensure you meet all the terms mentioned in the guidelines. This includes eligible locations, restaurants, and food items, as well as the minimum order amount. Some Coupons Are for New Users At DoorDash, some free delivery and discount deals are only for new users. Such promo codes won’t work unless you are ordering food from a new account. Also, you can only use a new user code only once or a couple of times.  Other DoorDash Promo Code Issues Sometimes the DoorDash app also runs into issues and keeps crashing. This can also cause complications and may become the reason behind the DoorDash promo code not working. So, if you think you meet the eligibility criteria and have a valid DoorDash coupon, we recommend you contact their customer support. In case you don’t want to waste time on that, there are other ways to find a new coupon. In fact, you may end up finding a more lucrative DoorDash discount coupon with a better deal.