If your car's engine or chassis number has changed, you are required to get clearance before you can reregister the vehicle.
You first need to apply at a motor vehicle registering office for a Request for Police Clearance. Then you need to take your vehicle to a vehicle clearance unit of the South African Police Service where vehicle will be cleared.
As from 1 September 2012 it's compulsory for any motor vehicle presented for a South African Police Clearance to be fitted with microdots.
There is no fee unless a new chassis or engine number needs to be embossed.