Ignoring a parking charge notice from a private operator like Smart Parking is generally discouraged by consumer advice organizations, as unaddressed private invoices can escalate into aggressive debt collection letters or potential civil court county court claims. Unlike official municipal fines, these notices represent private civil invoices based on alleged breaches of contract. Motorists who believe a charge was unjustly issued should formally appeal through the company or independent alternative dispute resolution bodies like POPLA rather than ignoring the paperwork entirely.