QUESTION
What can I do if my Command and Conquer Red Alert 3 install code is 19 characters instead of 20?
ANSWER
If you are trying to install Command and Conquer Red Alert 3 and the code is only 19 characters long, then it is missing the last letter or number. This was due to a misprint on a small number or manuals and we apologize for any inconvenience this has caused.
There is currently a work around that may allow you to bypass this issue. Since you have the first 19 characters of the code already, you can
basically try "guessing" the last character. To do this, simply enter your existing code, and then for the last character, try the letters A-Z, and then the numbers 0-9. You should eventually get the right combination, and be able to play the game.
[Via]