Managing tradespeople's beacons are done from the employee report. To get there navigate to the Report section in the main top level navigation.
Then in the sub menu head over to the Employee Report.
The employee report is very powerful and be used to run many different queries. To see all that you can do with the employee report check out the Employee Report documentation. To remove a beacon from someone simply search for their name, select their row and click the beacon management button.
This will bring up the tag management dialog for the selected tradesperson. In our case because we want to remove a beacon navigate over to the remove section, select the beacon you want to remove from that tradesperson as well as the date you took the beacon back. Then click Remove Tag from Employee and you are all done, that beacon is now ready to be used again.
You can only only remove a beacon if it was given to your project. If the beacon came from a different project you are not going to be able to remove it from a person.
To learn how to assigned a new beacon to a tradesperson click here: How to assign a new beacon to a tradesperson