Had you purchased the expansion through Origin or installed a disc version? If you had installed a disc version since The Sims 3 came out before Origin, not all DLC was requiring Origin registration. If you still have a product code, see about registering it by following the steps below: 🙂
If you already own The Sims 3 or any of the Expansion/Stuff Packs, and wish to register them on your Origin account, please follow the steps below. Please note, these are 20 digit codes – if your code has 16 digits, it’s for bonus downloadable content. You can find instructions on how to register 16 digit codes in the next section of this article.
1. Go to http://www.thesims3.com and make an account if you do not already have one. If you have an account, skip to step 3.
2. When making an account, enter your serial code for The Sims 3.
3. Once you are a registered member of the The Sims 3 website, login to your account so that you can then register any other expansion packs or stuff packs that you own to your account.
4. Click on the My Page tab.
5. Then click the My Account tab.
6. Click on Register a Game.
7. Enter the product code for the expansion pack or stuff pack.
8. Click the green Register button.
