Serial number invalid

if the game was bought 2nd hand/used the code/s will be tied to the original persons account and are non transferable nor can they be reregistered to another account for ,newly bought games either from origin or from a shop/store even newly bought games can run into the used/invalid code issue and you may need to contact CS

please read the FAQ first

http://answers.ea.com/t5/The-Sims-3/FAQ-Invalid-and-Used-Serial-Codes-amp-Games-not-showing-up-in/m-p/194028


if in the event you need to contact CS

1.https://help.ea.com/en/contact-us/
2.Click on the orange NEXT button
3.Select a platform
4.Click on the orange NEXT button
5.Select a topic and describe your problem in a few words
6.Click on the orange NEXT button
7.Click Chat Now to chat with a Game Adviser


guide on how to contact CS

http://answers.ea.com/t5/Beta-Archive/How-to-contact-a-Game-Advisor-using-the-new-EA-Help-page/td-p/...