Re: cant register sims 3 but i bought it on ea
@Navigrl Yes, that's exactly what it means. A code can only ever be registered to one account, even by the original owner of the content. You won't be able to use these packs unless you find the old account.
To that end, try entering any email address you still have access to on an EA site and clicking "Forgot your password?" If the address is attached to an EA account, it should receive a password-recovery email. Be sure to check the spam folder as well as the inbox.