If you've purchased a coupon from a 3rd party website in order to redeem on our website, all you need to do is create your star chart or city map and apply your coupon once you are on the Shopping Basket page. To use the coupon, simply click on "I HAVE A COUPON" located underneath your starmap details (on mobile) and in the top right corner on Desktop and Tablet.
Please note you will first need to create your poster and then redeem it with your coupon.