Recognition is not just a one way street with Wishlist! When you have received a reward you have the ability to send a Thank You Note to your Reward Sender. In order to do so go to the Rewards page and then the My Rewards tab. Here you will be able to see all the Rewards you have received. From here click on the "Read Reward Card" button on the Reward you wish to send a Thank You Note for.
Here you can see the note that was sent to you with your Reward and also Say Thank You. Click the button to send your Thank You Note.
Type in your message and then click the purple Send button.
You've now thanked your colleague for the Reward they sent you!