Things You'll Need
Instructions
Online at Xbox.com
Open your Internet browser, and go to Xbox.com.
Click the "Sign in" button located on the top right of the webpage. Input your Xbox Live email and password.
Click the "Marketplace" button located on the top right of the web page.
Click the "Add" button located to the right of the "Points Balance" heading.
Click the desired Microsoft Points amount, then click "Next."
Click the "Add a new credit card" button.
Input the credit card number found on the front of the card. In the "security code" heading, input the code found normally on the back of the card. Select which type of debit card you are using (Visa, MasterCard, AMEX).
Input your address and name information. Click the "next" button.
Click "Confirm" to confirm the purchase. The total will be deduted from your prepaid debit card and the Microsoft Points will appear instantly on your Xbox Live account.
Microsoft Card
Visit your local electronics store.
Head to the video games section, then look for the Xbox accessories section.
Purchase a "Points Card." A prepaid debit card will ring up at the register just like any other credit or debit card.
Xbox 360 Console Marketplace
Turn on Xbox 360 console.
Sign in to your Xbox Live profile.
Scroll to the "My Xbox" section of the main Xbox 360 menu.
Press the "A" button on your Xbox Live avatar in the "My Xbox" section.
Press the "A" button on the "Manage account" tab.
Press the "A" button on the "Memberships" tab.
Press the "X" button to open the Microsoft Points menu.
Press the "A" button on the desired Microsoft Points tab you wish to purchase.
Press the "A" button on the "New Card" tab.
Input the prepaid debit card information using the front card number. The security code is usually located on the back of the card.
Press the "Start" button to finalize the purchase.