Is my car a Tag Job? Barracuda Decode...

I'm not sure what the fuss is about here. VIN, serial number - ??? The Florida motor vehicle title for my 65 Barracuda calls the number on my door jamb plate an "identification number." An identification number for a motor vehicle would be a "vehicle identification number," or "VIN." Wouldn't it??

Or, from It Still Runs: "Automotive manufacturers assign a unique serial number called a vehicle identification number (VIN) to every motor vehicle for identification purposes." So it's a serial number and a vehicle identification number. Right?? Either would be correct?