The Sims 3 registration code is a 20-digit number that permits players to register on the official EA website or through the Origin client. A registered copy of the game gives access to the online community and store. Players also receive free in-game items, including Simpoints, clothing and another neighborhood.
Sims 3 registration codes are only good for one use. After registration, the code becomes tied to an email address and cannot be used for another registration. Players who buy used copies of the game may not be able to access the online content, though the base game is still playable without a valid registration code.