How to Claim Game Item Codes?
Step 1 : Login to passport.iahgames.com
Step 2 : Click on ‘BILLING’ then “TOP UP”
Step 3: Select your GAME and choose preferred Top Up option
Step 4: Select Coupon > Promotional Claim Code
Step 5: Enter the Coupon Code in the field and click "Apply"
Step 6: You will receive a notification once the transaction made is successful.
More info on the new IAHGames Passport here.