Re: Registration Code Invalid (2024)
@lady_chayley Just checking, but you're absolutely sure you didn't type in the wrong code, for example confusing an o for a zero? It's worth trying again just in case.
Otherwise, you'll need to contact EA customer support for help. I would strongly recommend using live chat rather than email. If you don't see the option, try this link:
Make sure you're signed into an EA site (this one is fine) before clicking the link and that the location in the lower-right corner of the browser window is set to U.S. or U.K.
Take a screenshot of your Steam CD Keys, with your username and Sims 3 itself showing in the background, as proof of ownership. You can upload this when you submit the help request.
Ask that the support rep manually add the game to your account because you can't use the Sims 3 site, and the only way to get access is to have the game in your EA account.
If you don't get anywhere with support, let me know.