Forza Motorsport 3 Redeem code?

Hi, Ive Purchased Forza motorsport 3 with the add on redeem code and used the redeem code already.

(I did not purchase the collectors edition)

Sadly i was unsatisfied with the game and i'm deciding to sell it.

Would the buyer of the game be able to access the redeem code even though i already accessed it?Forza Motorsport 3 Redeem code?
no i dont think so but you dont have to give them the add on code