Checking Balance on Redeemed gift card
How do I check if I have any credit left on a previously redeemed gift card?
iPod 5th Generation (Late 2006), Windows 8
If you've redeemed the card then any remaining balance should show on your account. My account's balance shows at the top right of the store's page on my computer's iTunes, by clicking on my name towards the top right of the iTunes screen, and by logging in to view my account via the Store > View Account menu option. On my iOS devices it shows at the bottom of, for example, the Featured tab in the App Store app under my account id (or you can view your account via Settings > iTunes & App Store and it should show on the screen that you are taken to). You might not see anything if you balance is zero.