B. To register an Account to play World of Warcraft, you will be required to provide Blizzard Entertainment with: (i) your name, address and phone number; (ii) the "Authentication Key" from the World of Warcraft Software product that you have purchased that includes the World of Warcraft software; (iii) accurate, complete, and updated billing information for payment of the Service subscription fee, including a valid credit card number, or other 'direct billing' information depending upon the method of payment you choose for the Account's access to the Service. Failure to comply with the foregoing or to update the foregoing if your contact information or billing information changes shall constitute a breach of this Agreement, which may result in the immediate termination of your right to use your Account to access the Service. This information is used to identify you as a "unique user" of World of Warcraft, and to ensure your payment of your Account. As such, it is imperative that you provide Blizzard Entertainment with accurate, up to date information. In the event that Blizzard Entertainment learns that you have provided false or misleading registration information, Blizzard Entertainment reserves the right to immediately terminate your Account.