If you’ve purchased a digital copy of Battle for Azeroth from our in-game shop or Blizzard shop, but want to upgrade to the Collector’s Edition, we will automatically credit you the cost of the digital copy in Blizzard Balance - as long as you enter the Collector’s Edition key before 11:59pm PST on March 31, 2019. When you enter the key from your Collector’s Edition, we will see the original transaction on your account and the credit will kick in. Remember, you will need to enter the Collector’s Edition key before 11:59pm PST on March 31, 2019, as automatic Blizzard Balance credits will be turned off at that time.