Esme's got my priorities too. "All of the above" except put it in the MAR as done.
I review a lot of charts for a living, and when I find myself looking at a treatment flow sheet that indicates treatments were done hourly all day for someone who died hours (or a day or two) before, my clients hear about it. Bear in mind that these cases are already in litigation because something happened. This really, really looks bad. Or you see, "Turned q2h, skin dry and intact" for days and days on end, and then a new nurse comes in or the patient transfers to another unit, and lo and behold, there's a stage 2 or 3 pressure ulcer. Uh, HUH.
If your supervisor cannot be brought to understand that she is putting your facility at risk for encouraging this policy, then you have to go over her head. Document your efforts in a journal or emails, cc'd widely, s they can't blame it on you later.
Call your own malpractice insurer and get advice from the atty there-- you have paid for it already and they can help.
And you do have to report it to the state or other accrediting body for your institution.
This can also be construed as Medicare and/or Medicaid fraud, because reimbursement is based on care delivered, there are mandatory reports made quarterly to the state Medicaid office for this. and if they are billing for a certain level of care but not giving it, then that constitutes fraudulent billing. A call to the state Medicaid office, yeah, THAT should get their attention. Of course, riling up these waters means you should have another job lined up, because they will want to get rid of you. But then you can really report them.
As to your charts, the standard convention for charting omitted doses/treatments is to draw a circle around that square and initial it. Do that and nobody will be able to falsify your charts over your signature.