We offer coupon code to customers in some special occasions, such as promotions & giveaways. Customers can apply the unexpired coupon code to their next purchase.
Here are some details for applying coupon code:
1) The coupon amount must be lower than the subtotal of the next invoice (Before shipping cost) to which you want to apply the code.
2) If the coupon value is higher than the subtotal of next invoice, no different or refund will be given.
3) You will easily find there is a blank to apply the code when you check out an order. And please be sure there is no space at the beginning or the end of the code when you copy and paste it.
4) All the coupon code can only be applied once.