Make sure you are in game and on the city you want to claim the code. Once there click market place in the lower right corner of the game and select Redeem. Then type your code in and be sure not to copy/paste. Remember it is capital sensitive. If you are still having problems please let us know. Thank you.
If I always appear prepared, it is because before entering on an undertaking, I have meditated for long and foreseen what may occur.
--Napoleon Bonaparte, 1831