Three checks, three different questions, and almost every guide on the internet treats them as three brands competing for the same job. They are not.
If you buy at auction, running the wrong one is how you end up with a car whose title is fine and whose history is not, or the reverse.
What each one actually is
NMVTIS is the National Motor Vehicle Title Information System, a federal database. State titling agencies, insurance carriers, and junk and salvage yards are required to report into it. It exists to stop title fraud and vehicle theft, not to describe a car.
Carfax is a commercial report. It pulls from a much wider set of sources and covers accident history and damage detail, service records such as oil changes and tire rotations, ownership history and previous owners, open recalls, title brands including flood and lemon, and odometer readings with rollback detection.
AutoCheck is Experian’s commercial report. Its distinguishing feature is the AutoCheck Score, a patented number from 1 to 100 that compresses the report into one figure, with a score range so you can compare vehicles of similar age and class.
| NMVTIS | Carfax | AutoCheck | |
|---|---|---|---|
| Type | Federal database | Commercial | Commercial |
| Title brands | Yes | Yes | Yes |
| Total loss and salvage | Yes | Yes | Yes |
| Odometer | Yes | Yes, with rollback detection | Yes |
| Accident history | No | Yes | Yes |
| Service records | No | Yes | Limited |
| Recalls | No | Yes | Not the focus |
| One-number summary | No | No | AutoCheck Score, 1 to 100 |
| Price published up front | Varies by provider | Not until checkout | Not until checkout |
The thing NMVTIS does that nothing else does
Once a state titling agency brands a vehicle, that brand becomes a permanent part of its NMVTIS record. That is the point of the system.
The fraud it was built to stop has not disappeared. Experian Automotive reported that in the first six months of 2008 alone, more than 185,000 titles were branded in one state and then re-titled in a second in a way that produced an apparently clean title. The trade calls it title washing, and a car that has been washed will look fine on a state title while its NMVTIS record still carries the brand.
For a dealer, this is the single highest-stakes check on the list. An accident you did not know about costs you margin. A washed title can cost you the car.
What NMVTIS deliberately leaves out
An NMVTIS report holds five things: current state of title and last title date, brand history, odometer reading, total loss history and salvage history.
That is all, and it is intentional. NMVTIS says so directly: private vehicle history providers offer information that is not intended to be included in NMVTIS, such as repair histories, recall information and other care and maintenance data. The report is meant to be concise and is generally shorter than a commercial one.
So if you run NMVTIS and see nothing about a rear-end collision three years ago, that is not the system failing. That was never its job.
The part almost every article gets wrong
You cannot get an NMVTIS consumer report from Carfax. NMVTIS states it plainly: consumers cannot receive NMVTIS vehicle history reports from Carfax, DMVDesk or Experian, because those entities provide the information only to dealerships.
Consumers and small buyers go through one of the approved NMVTIS data providers listed on the government site, among them Bumper, Carsforsale, CarVertical, CheckThatVIN, ClearVin, EpicVin, GoodCar, TitleCheck, VinAudit, VinData, VinReport and VinSmart.
That matters in practice. Someone who buys a Carfax believing it includes the federal title check has not run the federal title check.
The limit worth knowing before you rely on any of them
About 87% of the U.S. vehicle population is currently in NMVTIS, and the system warns that a search can return a false negative.
Commercial reports have their own version of the same gap. They see what was reported to them. A collision repaired privately for cash, with no insurance claim and no shop that reports records, appears nowhere. The car still has the frame damage.
Treat every report as a filter that removes bad cars, never as a certificate that a car is good.
How to actually run this at auction
The cost of a wrong decision is not symmetrical, so neither should your checking be.
- Run the cheap federal check on everything you are seriously considering. Title fraud is the risk that turns a car into a loss rather than a thin deal.
- Compare the issuing state against where the car has lived. A freshly issued clean title from a state the vehicle has no other connection to is the classic washing pattern.
- Run a commercial report on the short list only. Once the title is clear, accident and service detail is what changes your maximum bid.
- Use AutoCheck’s score for speed, not for the verdict. A number from 1 to 100 is a fast way to rank forty listings. It is not a reason to skip reading the report on the one you bid on.
- Put hands on the car. Overspray, mismatched panel gaps, a replaced radiator support and fresh undercoating tell you things no database holds.
Then price what you found
A report that changes nothing about your bid was a waste of money. Feed what you learn straight into the number.
A branded title moves the car into a different market with a smaller buyer pool, which is the argument in salvage, rebuilt and clean titles. Undisclosed accident repair usually means reconditioning you have not budgeted for, and the small lines are where margin disappears, as the true cost of a car sets out. Both then run through the auction fees in Copart vs IAAI before you land on a maximum bid.
The report fee is the cheapest line in the whole deal. The expensive part is buying the car anyway.
Frequently asked questions
Is NMVTIS the same as Carfax?
No, and they are not competitors either. NMVTIS is a federal title database that states, insurers and salvage yards are required to report into. Carfax is a commercial report built from a much wider set of sources, including service records. NMVTIS answers what the title says; Carfax tries to answer what happened to the car.
Can I get an NMVTIS report from Carfax?
No. NMVTIS states plainly that consumers cannot receive NMVTIS vehicle history reports from Carfax, DMVDesk or Experian, because those entities provide the information only to dealerships. Consumers use one of the approved data providers listed on the NMVTIS site.
What is actually in an NMVTIS report?
Five things: the current state of title and last title date, brand history, the odometer reading, total loss history and salvage history. It leaves out repair history, recall information and maintenance data on purpose, so it is shorter than a commercial report.
What is the AutoCheck Score?
A patented score from 1 to 100 that summarises the report into one number, with a score range for comparing vehicles of similar age and class. Accidents, mileage, title brands, odometer problems, frame damage, water damage, lemon branding, theft or repossession, and taxi or police use all push it down.
Does a clean report mean the car is clean?
No. About 87% of the U.S. vehicle population is in NMVTIS, and the system itself warns that a search can return a false negative. A clean result narrows the risk. Nothing replaces looking at the car.
Which one should a dealer run?
Run the cheap federal check on every car you are considering, because title fraud is the one risk that can make a car worthless. Run a commercial report on the short list, where accident and service detail changes what you are willing to bid.