You are required to enter the correct Licence Plate number when paying for your parking.
The PBP machine will display the number you have entered and the time selected before you finalise the transaction. If the plate number is wrong select 'Cancel' and start the process again.
If you enter the wrong licence plate number and press 'OK' at the final confirmation screen, the transaction cannot be reversed or credited at the PBP machine and you may incur an infringement because your correct vehicle plate number will not show any payment recorded against it.