The short version
Read the odometer yourself, have the seller certify "actual mileage" on a form with no blanks and no corrections, and keep a photo of the completed statement next to the dash reading. Then check that number against the previous disclosure on the title and the readings in the official records. The statement isn't the whole case for a car's mileage — but it's the one piece of it the seller signs their name to, and a seller who hesitates over it has already told you how the story ends.
Somewhere in the paperwork of nearly every used-car sale in the US is a box with a mileage number in it, a checkbox or three beside it, and two signatures under it. Most buyers sign it without reading it. That's a mistake in both directions: it's the one document in the deal where the seller commits to a mileage figure under federal law, and the reading you write in it today becomes part of the car's official history for whoever buys it next.
Here's what the statement is, when it's required, what each certification box means, what a false one costs the seller, and how to use it — this one and the ones signed before it — to check that the miles on the dash are the miles the car has driven.
What the statement is and when it's required
Federal law requires the seller of a motor vehicle to disclose the odometer reading in writing when ownership transfers, and requires the buyer to acknowledge it. On most modern titles the statement is printed directly on the certificate of title, in the section the seller signs at the sale. Where the title has no room, or a lender holds it, states supply a separate secure odometer form, and a growing number now handle it electronically.
Not every vehicle needs one. Vehicles above a certain age are exempt, as are vehicles above a certain weight rating and a few other categories. The age exemption is the one that trips people up, because it changed recently: newer vehicles stay inside the disclosure requirement for longer than they used to, and the cutoff is figured from the model year rather than a calendar date. Check your state's current rule rather than relying on what was true the last time you bought a car. For a car of any typical age on Facebook Marketplace or Craigslist, assume it's required.
"At transfer" means the moment the seller signs the title over to you. That timing matters. A statement signed with the mileage left blank, to be filled in later, is precisely the practice the law was written to stop.
Actual, not actual, exceeds mechanical limits
The statement has two parts: the number, and the certification that goes with it. The number is the odometer reading in whole miles — no tenths. The certification is where the seller says what they believe that number means. There are three choices, and only one of them is good news.
- Actual mileage — the seller certifies that the reading reflects the true distance the car has traveled, to the best of their knowledge. This is the default, and the box you want checked
- Not the actual mileage — the seller is warning you that the reading is wrong or unknowable: a replaced instrument cluster, a known rollback somewhere in the car's past, an odometer that sat dead for a while. State records often carry a "not actual mileage" note from then on, and it stays with the car
- Exceeds mechanical limits — the odometer has rolled past its maximum and started over. This is mostly a five-digit-odometer problem on older cars, where 99,999 clicks over to zero, but it's still on the form and still binding
What a false statement costs the seller
Federal law treats a knowingly false odometer disclosure as fraud. It gives the buyer the right to sue for civil damages that the statute multiplies to punish the intent, plus attorney's fees, and it provides criminal penalties for knowing and willful violations. States stack their own penalties on top. Figures and procedures vary by state and get revised; what matters for you is the structure: the form converts a vague "it's got about eighty thousand on it" into a signed, dated certification with the seller's name on it.
That's why the form is useful even when nobody ends up in court. An honest seller loses nothing by signing "actual." A seller who suddenly prefers "not actual" when the pen comes out, who wants to leave the box blank, or who asks you to fill in the number yourself has told you something the test drive couldn't.
One caveat. The law punishes knowing falsehood. A private seller who bought a clocked car in good faith and passes along the reading they were given has signed an honest form on a dishonest number. The statement protects you against the liar in front of you, not the liar two owners back.
How the statement builds the mileage trail
Every time a car changes hands, the disclosed reading goes into the state's title record along with the date. Over a car's life that produces a series of dated mileage readings, each one certified by a seller under federal law. Those readings are the backbone of NMVTIS, the federal title database, and they show up in commercial history reports alongside the readings that inspection stations and service shops report.
A rolled-back odometer has to fit between the last disclosed reading and the next one. If the title record says the car sold at 140,000 miles and the dash now reads 90,000, the fraud is a single line in a report. That trail is the core of checking odometer history without paying for a report — worth assembling before you drive out to see the car.
You can also read the previous disclosure before you buy: ask to see the title. The assignment section shows the reading the seller acknowledged when they bought the car, usually with the certification box they were given. Compare that reading and date with the number on the dash now. A car that has covered a plausible number of miles per year since the seller bought it is telling a consistent story; one that gained almost nothing across five years of ownership, or shows a lower number now, needs an explanation before it gets a deposit. Add the wear-and-sticker inspection for rollback and the seller's service records, and the number on the dash has to survive three independent witnesses.
Filling it out at the sale: the buyer's checklist
When it's time to sign, handle the statement like this, alongside the rest of the title transfer:
- Read the odometer yourself, from the driver's seat, and write down what it says before anyone touches the form
- Never accept a statement with the mileage blank, pre-signed, or "to be completed later" — an open odometer statement is an open title's twin
- No corrections: white-out, crossed-out digits, or a reading written over another one usually gets the statement rejected, and can sink the title transfer with it
- Whole miles only, and the number must match the bill of sale and every other form in the packet exactly
- Watch which certification box the seller checks, and ask before you sign if it's anything other than "actual"
- Both of you sign and print your names with the date; the seller signs first, in front of you, with a name that matches the name on the title
- Photograph the completed statement and the dash reading together, and keep the photo with your copy of the bill of sale
What the statement can't tell you
It's a self-reported number. A seller who doesn't know the car was clocked signs an honest form on a dishonest number, and a rollback done before the last transfer sits inside the trail looking normal unless an earlier reading catches it. Readings are also only as good as the records they land in: a car that spent its life with one owner has a short trail, and a car that has crossed state lines may have a gap where two systems didn't talk to each other. If the title is held by a lender, or a dealer is signing under a power of attorney, the statement lives on a separate form and the same rules apply — your reading, no blanks, no corrections, both signatures.
So use the statement for what it is: the moment the seller commits to a number in writing, and one dated point in a trail you assemble from title records, inspection readings, service stickers, and the wear on the car itself. Any single witness can be fooled. All of them at once is expensive to fool, which is exactly what the law was counting on.