When you deem it warranted (i.e. tech issues make the lesson unteachable), the student should get his/her point back. In most cases, you will still get paid. Follow this flow chart to see exactly what should be done.
As mentioned in the flow chart, complete a lesson record, and indicate at the very bottom of the lesson record what happened and why you issued a refund. This is to expedite the process should it come up later with the student.
In the case that you issue a refund, but you think you should not be paid for the lesson (i.e. it is a recurring tech issue that you have not fixed), there is a place for you to mark that on the lesson record. It is right at the bottom of the record - it is only visible if you click "Yes" for the refund field:
