Forum Discussion
I tried registering them on Origin and the Sims 3 store, but it say the keys have already been used.
@bethiebunnie Then they're already attached to an account, and you'll need to figure out which one. If you don't know what email address you might have used to register your games, you can open an Origin login window, enter any address you can remember, and click "Forgot your password?" An address associated with an Origin account should receive a password recovery email. Be sure to check your spam folder too.
If you don't get anywhere with this, you can contact EA customer support and ask for assistance. Maybe someone will be able to help you figure out what account the content is registered to, and therefore how you might be able to access it.