per-diem
we have a policy on PD as follows
you arrive home off a trip or positioning home before lunch time (Half Day)
You depart after Lunch time (Half Day)
Now on to standby days, at home if the company sends you home at their choice and puts you on standby I can think of many companies that would pay you etc.
However if you have mixed domiciled crews and you end up at your home base and you go home at your own choice or to a friends place we do have Half Day Policy but your at their mercy should they call you back to work.
Flight Duty day is just that, I have worked for a major swiss operation whom senior CAM (Crew Air Managers) attempted to cancel our PD if we had breakfast in the hotel or consumed any aircraft catering.
so many people get so upset about PD due to tax situations some countries have strict ruling on documentation some do not.