Registering your game?

Here are a couple of links which may help

Register a Game - The Sims 3

About Origin - The Sims 3

If you still need assistance, contact Customer Service/Game Advisors, here's how

here's how:

1 Click on the following link: https://help.ea.com/contact-us
2 Make sure you are logged in (top right corner)
3 Click on the blue button "Contact a Game Advisor"
4 Enter the name of your game or product (or "Origin" for account-related issues) and click "Find Solutions"
5 Select the type of issue and the platform you play on, and click on "Find Solutions".
6 Click on the blue button "I still need help" if the FAQ articles do not apply to your situation.
7 Select a contact option. Note that you may get different contact options depending on your country.

✔ Please don't forget to resolve your question if this helps and Click XP if someone helped!