Look VERY closely at 8 and B's. There's other letters that look the same but this is the most common mistake.
If its not that simply use any serial code from the internet, loads posted on youtube. They work for the game but not on the site as you can only register once on the site.. not the case with the actual game though
I wouldn't feel bad about it either!
When I lost my booklet contacted EA the game was registered on the site AND I had the Amazon receipt.. they told me to go buy another game! So.. I have no qualms in telling people how to get codes~ If you had said what game or expansion I'd have given you one right now.
