If you notice a 'friend' on you list who you did not add or if you would like to remove some friends from your list you will be able to remove them by:
1) Log into your Sumdog account
2) Click on the House panel
3) On the right side of the screen you'll see a panel called Friends. Click on Add friends
4) You will then be able to see all your current on the right under Your friends.
5) Under the name of the friend you would like to remove click on Unfriend. That user will then be removed from your friend's list.
You will now no longer be able to send gifts to that user or view their games score under Friends' best.