If the code you entered is active, the 'Codes' menu will disappear and the goodies you've just claimed will be added to your account. But if the code is no longer working then nothing will happen when you press the 'Redeem'.
If the code you entered is active, the 'Codes' menu will disappear and the goodies you've just claimed will be added to your account. But if the code is no longer working then nothing will happen when you press the 'Redeem'.