When entering a Shift Code for a Golden Key in Borderlands 2, it will say "Submitting code to Gearbox Software Shift... please wait". If the submission fails you might receive the following error messages
Contents
Code Already Redeemed[edit]
Message[edit]
Sorry, but the code you have entered has already been redeemed
Cause[edit]
Most likely this code was a limited quantity redemption code, for example only 10,00 codes were made available and they have all been used.
How to Fix[edit]
Enter a code from contest or giveaway as soon as the code is announced. If you wait too long, the code might no longer be availab
Code Not Valid[edit]
Message[edit]
Sorry, but the code you have entered is not valid. Please ensure all 25 characters of the code are entered correctly
Cause[edit]
Most likely you mistyped some character, or are missing a character
How to fix[edit]
Check the code again and re-enter.