Things You'll Need
Instructions
Find the credit card you used to sign up for your Xbox Live account. Make a note of the last four digits on the card. If you are unsure which credit card you used, turn on your Xbox, log into you Xbox live account and navigate to the Account Management tab in the Xbox Live section of "My Xbox," on the Dashboard. Write down the four digits shown on your credit card details.
Open your Internet browser and navigate to the Passport Network or Microsoft Hotmail website. Log into your account. Either website work because both are linked to the Passport network. You can do this by visiting Passport.net or Hotmail.com, clicking on the "Login" button and entering your account name and password. If you do not have either of these, visit Passport.net or Hotmail.com and click on the "Create new account" link, then follow the on-screen instructions to create a free account.
Navigate to the Xbox Live website on your Internet browser. Click on the "Login" button and enter your Passport or Hotmail username and password. You will be prompted to link your Passport login to a gamertag. Enter your name, ZIP or post code, telephone number and the four digits from your credit card and click "OK."