Instructions
Log in to the Yu-Gi-Oh! Online system using your user name and password.
Purchase a BOOSTERPASS code using a credit card or PayPal.
Check your email after completing the purchase. The 16-digit BOOSTERPASS code is sent to the address used when creating your Yu-Gi-Oh! Online account.
Double-click the Yu-Gi-Oh! Online icon on the desktop to start the game.
Click "BOOSTERPASS" from main menu in the upper left hand corner of the game screen. A prompt will request the BOOSTERPASS code you purchased.
Type the 16-digit BOOSTERPASS code in the text field and click "OK". A status message will confirm the addition of BOOSTERPASS points to your account.