When you arrive at the car park exit barrier the car park system reads your credit card, checks your pre-booking file and calculates the duration of your stay. If you have over-stayed the system establishes whether any additional fee is due. If an additional fee is due, you will be required to pay the fee for the overstay.Your credit/debit card will be charged the appropriate fee for the additional time based on the drive up tariff applicable on the date of your departure from the car park.