About Mystery box codes

• Hatsunechan wrote on 2011-01-07 15:49
  Official website and wiki say boxes must be opened before January 11th, but do I have to redeem the codes by then or can I just keep them for now and redeem them later?
• Cynic wrote on 2011-01-07 15:50
  If I'm not mistaken, the codes don't have an expiration date.
• Hatsunechan wrote on 2011-01-07 18:42
  Thank you! ^^
• Fyois wrote on 2011-01-07 18:49

  Quote from Cynic;280360:

  If I'm not mistaken, the codes don't have an expiration date.

  
  
  You are not mistaken. They never expire. I have a bunch left over from the september one that I've been slowly picking away at. If they do expire, it takes way longer than a year. But I somehow don't think they do, seeing as when you do the math (16 digits, 16 possible characters that can repeat and the order doesn't matter), there are over 18,000,000,000,000,000,000. I don't think they ever need to make the codes expire. XP