How to enter pre-order bonus code
If you pre-ordered Assassin's Creed Syndicate, you may have received an email like this:
Congratulations!Your Pre-Order of Assassin's Creed Syndicate qualifies you to receive 10,000 bonus credits for the Join the Family rewards program!
Your unique code:
TGP-XLH7-UNGK-6MRL-EXGAHow to register your code:
1. Visit http://www.assassinscreed.com/rewards
2. Click on the login link.
3. Login to your Uplay account or signup to create a new account.
4. After registration or login, enter your code as directed.
5. A list of rewards and redemption instructions is viewable on the site.
You aren't exactly directed to enter a code. If you click on "Bonus Code Redemption" and enter your code, it will reply "Error: This entry is invalid."
Here's the trick!
1. Click on View All Activities
2. Scroll all the way to the bottom of the activities where it says "Amazon Pre-Order", "GameStop Pre-Order", "Target Pre-Order", "Walmart Pre-Order", and "BestBuy Pre-Order".
3. Click on the one corresponding to the store that sent you the bonus code.
4. Enter the code (complete with dashes) and click "Submit".
Boom: 10,000 points
Darn. Looks like you already used your code. 
“Force has no place where there is need of skill." Herodotus