Here are some reason why you are not able to use the promo codes:Promo codes that has expired.Promo codes that are only one-time use cannot be used again. If you have used a certain promo code that offers a one-time use, you cannot reuse the code again. Promo codes are not valid on sale items, last chance, discounted items and final sale. Only one promo code can be used per order.ROSARINI reserves the right to change and update on the uses of promo codes.