l If you are trying to use amerchant coupon, you can only apply it to items from the merchant store that issued the coupon.
l Check whether the coupon has expired. Please check your coupon information in "My Coupons". If the coupon has expired or has already been used, the coupon can not be used anymore.
l Has the total value of your purchase reached the minimum amount required by the coupon?
For example, if the coupon requires a minimum purchase of $100 and your order is only $80, the coupon cannot be used.
Please check the terms and conditions for coupons. Some coupons can only be used for certain categories.
Your coupon may no longer be valid. Please check the coupon's terms and conditions to ensure that you are using the coupon within its validity period.