In the US, Customs/DHS controls entry.
#1 Customs/DHS
Under them, the NHTSA handles safety standards. They require a HS7 to be filled out.
#1a - NHTSA - HS7
Alongside them, we have the EPA that handles emissions
#1b EPA - 3520-1
When a car enters the country you need some kind of ownership document
#1c Ownership doc
You also need an invoice to show value so you can pay tariff
#1d - Invoice
So unless a vehicle came in though Customs/DHS, NHTSA cleared it, EPA cleared it, there is some kind of title, and you paid tariff, it was not done correctly.
A seized car, that was seized due to non-compliance is required to be exported or destroyed. Now never saying those people don't make mistakes. I have seen it many times.
State title, we see it all the time.
There are 100 ways to do things illegally, to bypass the law, but there is ONE way to do it right.
Its like saying I did drugs in my house last week and no one caught me. I am fine. I see people all the time ignorantly spouting off about what they have, what they "got away" with.