You can customise the free of charge in the drop down.  This is useful if you want to extend the default list of reasons.

Watch a quick video showing you how to add a free of charge reason

Or read how to add a free of charge reason

1. Click on the settings icon in the top right corner and click System settings
   
   
   
   
2. In the list of jobs click Free of charge reasons
   
   
   
   
3. You will see a form on the left hand side and a list of existing free of charge reasons on the right hand side.  You can add your new free of charge reason on the left and it will appear on the right when you click Add free of charge reason