Promo codes can't be used for pre-orders, new releases, select signed albums, gift cards, fan packs, and event products (e.g., PLAY82, Fansign, Video Call). 

Each code can only be used once. To check if a code works for your items, add them to your cart and click "Apply" before checkout (don't complete the purchase). 

If the code doesn't work at checkout, it was either already used or is invalid. 
Some codes also require an active SMS/email subscription.