Here's an appeal you can use as the keeper:
Dear Sirs,
I have received your Parking Charge Notice (Ref: ____) for vehicle registration mark ____ ___, in which you allege that the driver has incurred a parking charge. I note from your correspondence that you claim to be able to hold me liable under Schedule 4 of the Protection of Freedoms Act 2012 ("the Act"), but this is not true. You have failed to deliver the notice within the relevant period of 14 days as required by paragraph 9(4) of the Act.
Date of parking: 27/04/25
Date of issue: 12/05/25
Date of presumed service under 9(6) of the Act: 14/05/25
Days elapsed: 17 days
I am appealing as the registered keeper. There is no obligation for me to name the driver and I will not be doing so. I am therefore unable to help you further with this matter, and look forward to your confirmation that the charge has been cancelled. If you choose to decline this appeal, you must issue a POPLA code.
Yours,
Appeal as the keeper only, select "Other" as the appeal reason on the website. Keep an eye on your spam folder for their response.
It'll be interesting to see what their response is... Their recent trick has been to (falsely) claim that simply issuing the notice within 14 days is sufficient (it isn't), but here they haven't even issued it within 14 days.
You should also complain to them and DVLA about this conduct... I'll dig out some wording you can use later.