Please check if you wrote the coupon code correctly. Most of our codes are written in capital letters.2. Many promo codes have special rules of application. Check the details at the place where you found the code. Rules of application might be:- minimum purchase amount- limited to a product category or specific product- only valid for a certain amount of time- limited to one usage only- only available for users / subscribers3. If it's still not clear, why the code does not work for you, please contact our customer service through email or phone.