How often will insurance companies get an error file?

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• Tennessee will email a website to pick up the error files. Will this always be the same location?
• How would the Department of Revenue handle a situation like when an insurance company sending a full book of business (FBOB) with a VIN that doesn't show up in Tennessee registrations (a miskeyed number)?
• Does Tennessee require vehicles with commercial coverage to be reported?
• What is the format of the error file?
• Will the error file be policy-specific or will it be by VIN?