What does the warning mean?

amtronic1 said
Very thorough! The thing is, I had just sold a Corvette to a guy in New York, and all he needed was an emailed bill-of-sale. And it had a very short VIN also. I guess it really varies a lot state-to-state how they treat car titling.

The only place the officer looked at on mine was the door jam where I showed him. He didn't care to look anywhere else!!