When types of Capptions needs to be completed by a member of a certain team (or your whole organisation), but it's not important who completes it, you can check the 'single user' box.
This means that the scheduled Capptions is assigned to the whole group of assignees, but one of the assignees completes the Capptions, the Capptions disappears.
In the image below this scheduled Capptions needs to be completed every week by a member of team Capptions.
N.B. Scheduling is a premium feature. It can be found in step 3 of the template editor