You have blot out the RFID Serial number.
In the HDB Carpark Div records that S/N is linked to the particular
vehicle.
RFID S/N -> Vehicle N/Plate -> Applicants particulars.->
Carpark allocated.
Only the parking warden with the handheld device will know the
details.
So if the red parking spaces in your carpark are all taken up, you
cannot tell who the outsider, if any, is.