You currently have gold (wait for gold to expire then use)
You are currently using a trial (wait for trial to expire then use)
You have an outstanding balance on your account (your account status will show as suspended, you will need to pay that balance first before you can use it)
A REFUND WILL NOT BE GIVEN FOR ANY OF THE REASONS ABOVE, AS THEY ARE THE REASON YOU CANNOT USE IT, IT HAS NOTHING TO DO WITH THE CODE ITSELF.
THE CODES DO NOT STACK, YOU CAN ONLY USE 1 CODE AT A TIME
DO NOT USE MULTIPLE CODES AT ONCE
WAIT FOR EACH CODE TO EXPIRE BEFORE USING ANOTHER
The Xbox Live 14 Day TRIAL gold code allows you to have most of the benefits of gold accounts including:
Joining party's, playing online multiplayer!
(YOU WILL NOT GET GAMES FOR GOLD OR OTHER GAME DISCOUNTS OR ACCESS TO THE CLOUD STORAGE)
The code will not turn your account into gold, you will still remain a silver member but have the benefits of gold stated above. The codes can only be redeemed on a silver account. If you already have an Xbox live gold membership you will have to wait for it to expire before redeeming the new code otherwise it will give you the ''Invalid code'' error.
The codes will not show in your subscription page as they are only a trial, and they will not appear in your account purchase history either, as they are not something you can buy on the xbox store.