In case you enter a discount code during checkout that doesn't exist or isn't currently active, then you can see the message: “Unable to find a valid discount matching the code entered”.

Please check out Ref.com's site to be sure that there are available Ref.com coupons for promotions or Customer Service at that time. In case you are chosen to obtain those available coupons, you may receive your coupon by email, or a mailed catalog or postcard.

Normally, one discount code is only applied for one offer. However, If the users put a vast of items in their cart, it is easy to use one coupon code to purchase items. It depends on Ref.com's policy, you can contact Ref.com via mail for your reference.

Yes. Coupons for each Discount Event of Ref.com will be collected here while being updated day by day. Sometimes, there will be deals not updated promptly but it's rare, we expect sympathy from you. 

Our advice for you to use Ref.com Coupon effectively is to choose the right day.
Like thousands of other consumers, the time of promotion is when they choose to
shop at Ref.com, so take advantage of coupons released on those days to save.