To claim a code on the Blizzard Account Management site: 

  1. Log into Blizzard Account Management
  2. Enter the code in the Redeem a Code box and click Redeem Code
To claim a code through the Blizzard Battle.net App: 
  • From the Games tab, click the Redeem a Code button found under the logo of any game
  • From the Shop tab, click Services and then Redeem a Code