Book your parking space at Frankfurt Airport online via parken.frankfurt-airport.com.
Immediately after a successful booking you will receive a confirmation email and within a few minutes your Mobile Parking Pass by email with the QR code for the entry and exit. Make sure to you check your emails and your spam folder just in case the email got delivered there instead of your inbox. If so, select the message and click “Not Spam”, which will allow future messages to get through.