Airport Parking Card and Receipt
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When entering any parking facility, one usually takes a ticket at the entrance. Then, at the Rome airport, for example, one takes the ticket inside, gives the attendant the ticket and pays (or alternately inserts it into a machine and pays), receives the stamped ticket back, and inserts the ticket at the exit booth upon exiting the parking facility. The ticket is returned by the exit booth and serves as the receipt.
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