Home / Car Park Management / FAQ / How does ANPR enforcement work step by step? How does ANPR enforcement work step by step? ANPR typically follows these 4 simple steps 1. A car drives into a car park, and the ANPR camera records the number plate and the time of arrival. 2. The car leaves, and the camera records the number plate and exit time. 3. The time spent in the car park and payment confirmation are checked. 4. If there isn’t an issue, nothing happens; if there is, a parking charge can be issued.