A Safety Certificate is valid until I sell the motor vehicle. False: A Safety Certificate is only valid for 2 months from the date it is issued or until the car has traveled an additional 2,000km whichever occurs first.s you can see using the Vehicle Identification Number (Vin Number) from the vehicle to do a Revs Check gives the seller what the buyer needs to know and wants to know which makes it a powerful selling tool to sell the car quicker. It gives you an official PPSR certificate or better known as the REVS Report.