On what grounds do you suspect the PCN has been incorrectly issued?
There is no invitation to the RK to pay the invoice.
Use the appeal above and it'll quickly move to step 3 in DWMB2's post above. If you're happy to play the waiting game hoping they will discontinue before court then that's fine. If you want to make it go away at first or second appeal stage you'll need something a lot stronger than telling Parking Eye they don't know how to word a PCN.
But the issue is that ParkingEye don't - their invoice fails to include the mandatory invitation to keeper to pay the charge required by POFA Schedule 4, para 9(2)(e).
POFA isn’t optional. If any of the statutory elements are missing, the NTK is non‑compliant and keeper liability cannot be created. In this case, the NTK simply does not contain the required invitation to the keeper to pay the charge or to name the driver.
That is a complete POFA failure, not a stylistic one. ParkingEye are therefore limited to pursuing the driver only, and as they do not know who that is, the keeper cannot be held liable.
Whether they discontinue before court is up to them, but the legal position is straightforward: no POFA compliance = no keeper liability.