Coupons can only be used on the FITE website. To use one you have to click on "Buy" or "Purchase options" and then "Buy". A pop up will appear where you will need to select your payment method. Select "Have a coupon?", enter your coupon code and submit. Your show will be ready to watch.
***Coupon can be used only once***
If you are trying to Redeem a FITE referral code please take a look at this article.