Our coupons are limited to one use per customer per coupon code. Multiple coupons cannot be applied to a single order. Customers must establish an account (no "guest checkout") to use a coupon code. Coupon codes are not valid on orders placed with a Purchase Orders. The order must be placed online and paid for at the time the order is placed. Single use coupon codes cannot be reused even if the order has been returned. We will apply coupons to an order that it an exchange for a like item (same item, just a different size/color etc.). Please contact us so we can manually make that adjustment for you.