Re: Registration Code provided in Digital Download not working.

When you buy the game from Origin, it is automatically registered for you on the Sims site; it can take some time for it to show up on your "my page" though.  Try logging in and out of both account and see if that helps.  Here are some helpful posts on registering your games:

-- http://answers.ea.com/t5/The-Sims-3/Information-How-to-Register-The-Sims-3/m-p/387162
-- http://forum.thesims3.com/jforum/posts/list/656133.page
-- http://forum.thesims3.com/jforum/posts/list/655809.page


If you're still having issues after a day or two then you should contact EA here-- https://help.ea.com/en/contact-us/ask

Also, here is a post explaining how to navigate the contact page since it can be confusing: http://sims3.crinrict.com/en/2012/10/how-to-contact-ea.html