Not really an issue if its an honest admin error is it?
Oh yes it is. Wrong plate on the car is a major issue. No excuses for 'admin error' at all. Different in different countries but most driving unregistered is a fine and loss of points, driving uninsured is a far more serious offence. And a disaster IF the vehicle is an accident. Even back in the 70s.
What has been a common 'dodge' here in Oz is trailers,, 2 or 3 trailers with one numberplate. But the cops can tell the difference between a tandem car trailer and a 6x4. And for decades must have a VIN no.
A few have been caught, and since it was deliberate end up in court.
Having built a few car trailers for myself and assembled a kit 6x4 for a friend I have learnt the rules.
And quite a few are having difficulty registering obviously old trailers that have never been registered. With no previous details.
And as a licenced car dealer there is far too many shonky cars out there. Rebirthed, stolen and given a new ID from a wreck. Been there and done that. As in buying a used engine and then TWO cars have the same engine number, mine was legit with paperwork. The other was a dead loss to the dealer who bought it. The other car had taken the details and identity plate from the wreck at a crash auction. After this that wrecker would simply bounce back cars with no ID as he was treated as a crook by the police, at least initially.
As for special interest cars,, Falcon GTs, Monaros XU1s, 6 pack Chargers etc as well as imported muscle there seems to be more now than in the 70s! Yet report them as advertised on Ebay the 'authorities' do little. Both as cars and simply ID plates.
A GTS350 Monaro I had in the 70s these days is a different car to what I had, with the same ID. Fraudulent and someone will get burnt. Either by the law or as selling a car that is NOT what is is supposed to be.
There has been quite a few of these.
A friend has been driving around for years in his 70Mustang with a 68 Shelby ID plate in the console. He had some explaining to do when searched [illegally] by the police. The plate was from a totalled car and reported as so. Luckily for him.