Here are the steps on how to use Promo Codes when shopping at thelettermate.com: Make sure you have an account in The Lettermate; if not, you can create one first, then select your favorite products to add to your cart. Next, click on [Proceed to Payment], below the items listed, you will see a box that says [Add Coupon Codes]; tick the The Lettermate Coupons of your choice and automatically return to the checkout page, You will see that the actual payment total has been reduced.