With Sportrick you can move a multipack from one user to the other in order to replace the holder of the subscription with another. By doing so the person who receives the multipack can enjoy the remaining period of validity of the multipack.

Open the user's profile and click on the multipack to open the details

Click on the Substitution button and type in the name of the new person that will be the holder of the multipack, the click on OK to save the changes.

Now Clare is the new holder of the multipack.