Refer back to my post and the information within (even if there is the odd spelling mistake on the site I linked). Don't make this more complex than it has to be: https://www.geekzone.co.nz/forums.asp?forumid=48&topicid=303254&page_no=2#3028347
Even if there are T&C's there you can just as easily state by them contacting you they agree to your terms and conditions of charging $100 for every second you're defending the matter (ok, maybe not that far) but nobody reads the T&C's in car parks and also this doesn't change the fact they can't legally "fine" you. They're hoping to scare you into paying.
@halper86 $20 is too much. Cap it at $5 for a free car park if you want them to bugger off else just pay the value of the time overstayed if it is a paid park. You still don't owe them anything and if they have not sent you out a letter to your home address before you revoked your access you can pretty much ignore the breach notice entirely.


