You'll also notice on the Wizard101 launcher the following message: No Need to Trade your Treasure Cards for Codes! There's no reason you need to give up your hard earned Treasure Cards to players who promise you codes! The one and only multi-use code that is currently active is 'spell'. All other generic word codes are deactivated. Remember - codes for the Umbra Sword are one use and cannot be exchanged!
To Redeem a Card or Code, log in to Wizard101.com the website and click the words Redeem Card or Code.