What should I do if I encounter a pop-up message “Mileage charge unsuccessful” error? Leah February 23, 2024 07:27 Updated Unsuccessful mileage charges may apply at the end of your booking. If this occurs, you will not be charged. But don't worry, an SMS will be sent to you with the charges and details on how to pay once we have reconciled the mileage for your booking. Related articles What is the minimum/maximum duration for me to book a car? Can I amend my booking timing? Why are cars with minor damage available for use? How do I extend my ongoing booking? How much does it cost to book a vehicle per hour?