In this Situation the Pilot Flying is Paying for the Entire Flight, but a second Pilot acting as a Safety Pilot needs to log time without an invoice being generated.
In this situation the Pilot Flying would log their flight like normal including: Total Time, Hobbs/Tach Start/End Times, etc. They will get an invoice for the full total time of the flight.
The Safety Pilot would then log their flights, but will toggle on the “Skip Meter Readings” portion of the logbook entry screen.
When turned on Skip Meter Readings will disable and hide the Hobbs/Tach entries and allow the Pilot to log a Flight that does not appear on the Fleet’s dashboard and will skip the invoicing. Since the Pilot Flying handled creating the records required for the Fleet, the Safety Pilot is only logging the flight in their logbook for Time Building Reasons.