Product Validity To check the originality of the product, please enter the serial number on the package. Please pay attention that turning the page to yellow, means the product is repetitious. Which means either you have entered the number before, or you are using a wrong code. Red means it is certainly fake. Green means first validation. So, after purchase and entering the product code, you should see green. Please pay attention that only after the first attempt, you see green, and after the second attempt you should see yellow, and the date of the first visit will be recorded.