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Procedure 2026 Guide

How to Report Suspected Odometer Fraud After Buying a Used Car

Learn how to document suspected odometer rollback, compare mileage records, report an individual case to your state agency, and contact NHTSA about a larger fraud scheme.

2026 GuideUS United States Driving & Vehicles ~ 7 min read 7 FAQ Updated 2026-09-22
How to Report Suspected Odometer Fraud After Buying a Used Car — United States guide
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Author: Helpydo Verified by: National Highway Traffic Safety Administration Verified: 2026-09-22 7 min reading time

Helpydo structures practical guidance around official or public sources. For individual cases, confirm requirements with the responsible institution.

Quick answer

If you suspect odometer fraud after buying a used car, preserve the title, sale documents and mileage evidence, compare the odometer with title, maintenance, inspection and vehicle-history records, and report the individual case to the odometer-fraud enforcement agency for your state. NHTSA publishes a state-by-state enforcement directory. If the information involves a large-scale odometer fraud scheme, NHTSA directs consumers to its Vehicle Safety Hotline at 888-327-4236.

CostNo federal fee is stated by NHTSA for reporting suspected odometer fraud to the appropriate enforcement agency or for contacting NHTSA about a large-scale scheme.
Processing timeNo nationwide processing or investigation time is published. Individual complaints are handled by the appropriate state enforcement agency, while NHTSA investigates larger federal odometer-fraud matters.
OnlineCheck options
InstitutionNational Highway Traffic Safety Administration

What you need

  • Identify the vehicle, preferably with its VIN, make, model and model year.
  • Keep the title and any odometer disclosure provided when ownership was transferred.
  • Record the mileage currently displayed on the odometer and preserve evidence showing the mileage represented when you bought the vehicle.
  • Gather purchase documents and available maintenance, inspection or repair records showing mileage.
  • Check available vehicle-history information for earlier mileage entries or discrepancies.
  • For an individual suspected fraud case, use NHTSA's state enforcement directory to identify the agency that handles odometer fraud in your state.
  • For information about a large-scale odometer fraud scheme, contact NHTSA's Vehicle Safety Hotline at 888-327-4236.

Eligibility

Anyone who suspects that a used vehicle's mileage was fraudulently altered or falsely represented can provide the information to the appropriate enforcement authority. NHTSA directs individual odometer fraud cases to the relevant state enforcement agency and directs reports concerning large-scale odometer fraud schemes to NHTSA. Federal law prohibits disconnecting, resetting or altering an odometer with intent to change the mileage indicated, and it also establishes mileage-disclosure requirements when covered vehicles are transferred.

How to do it

  1. Preserve the evidence before changing anything. Keep the title, purchase agreement, odometer disclosure, advertisements, invoices and other records connected with the sale. Photograph the current odometer display and keep records containing earlier mileage entries.
  2. Compare the title with the odometer. NHTSA recommends checking the mileage shown on the title against the vehicle's odometer and examining the title carefully if its mileage notation appears obscured or difficult to read.
  3. Check other mileage records. Compare the odometer with maintenance and inspection records, oil-change or maintenance stickers and available vehicle-history information. Note each mileage entry and its date.
  4. Report an individual case to your state agency. Use NHTSA's official State Enforcement Agencies for Odometer Fraud directory. The responsible office differs by state and may be a motor vehicle department, attorney general, state police, consumer-protection office or another enforcement agency.
  5. Contact NHTSA for a large-scale scheme. If your information concerns a larger odometer-fraud operation rather than only your individual dispute, call the NHTSA Vehicle Safety Hotline at 888-327-4236. NHTSA also lists TTY 888-275-9171 for individuals with hearing impairments.
  6. Consider your federal civil rights promptly. A person who violates the federal odometer law with intent to defraud can be liable for three times actual damages or $10,000, whichever is greater. A private federal odometer claim must be brought no later than two years after the claim accrues.

What is odometer fraud?

Federal law prohibits disconnecting, resetting or altering a motor vehicle's odometer with intent to change the mileage registered by the odometer. Federal law also regulates mileage disclosures when vehicle ownership is transferred.

NHTSA describes odometer fraud as a crime and maintains an Office of Odometer Fraud Investigation that investigates potential federal violations and assists state agencies enforcing odometer laws.

A mileage discrepancy does not by itself prove fraud. An odometer may have been repaired or replaced, records may contain mistakes, and federal disclosure rules include exemptions for certain vehicles and transfers. Preserve the evidence and let the appropriate enforcement authority determine whether a violation occurred.

What should you check before reporting suspected fraud?

Start by building a mileage timeline. NHTSA recommends comparing several independent records rather than relying only on the number currently displayed on the dashboard.

  • Vehicle title: compare the mileage recorded on the title with the odometer and inspect the title closely if the mileage notation appears altered, obscured or difficult to read.
  • Maintenance and inspection records: compare dated mileage entries with the current reading.
  • Service stickers: look for oil-change or maintenance stickers on windows, door frames, in the glove compartment or under the hood.
  • Vehicle history: NHTSA recommends requesting a vehicle-history report and checking it for mileage discrepancies.
  • Vehicle condition: compare the reported mileage with wear on components such as the gas, brake and clutch pedals. NHTSA also notes that tire condition can provide another clue.

Keep copies of the sales advertisement, purchase contract, title, odometer disclosure and communications with the seller when available. These records can help establish what mileage was represented when the vehicle was sold.

Where should you report an individual odometer fraud case?

NHTSA directs individual odometer fraud cases to the appropriate state enforcement agency. NHTSA maintains an official state-by-state directory identifying the agency and contact information for each state.

The responsible authority is not the same nationwide. Depending on the state, it may be a department of motor vehicles, attorney general's consumer-protection office, state police, transportation department or another enforcement unit. Use the NHTSA directory rather than assuming that your local DMV is always the correct investigative agency.

Because the complaint procedure and evidence requirements are determined by the state agency handling the case, there is no single national complaint form, submission method or processing time for an individual odometer-fraud complaint.

When should you contact NHTSA directly?

NHTSA distinguishes an individual case from information concerning a large-scale odometer fraud scheme. For a large-scale scheme, NHTSA instructs consumers to contact its Vehicle Safety Hotline at 888-327-4236. The listed TTY number for individuals with hearing impairments is 888-275-9171.

NHTSA's Office of Odometer Fraud Investigation conducts criminal investigations for potential prosecution by the U.S. Department of Justice and assists state agencies with enforcement. The Department of Justice Consumer Protection Branch has primary responsibility within DOJ for prosecuting federal odometer-fraud cases.

What mileage information should a seller disclose?

Federal law generally requires mileage information to be disclosed in connection with the transfer of ownership of a covered motor vehicle. The federal disclosure form warns that if the odometer reading does not represent the vehicle's actual mileage, the transfer document must identify an odometer discrepancy.

Federal regulations contain exemptions, so the disclosure obligation is not identical for every vehicle. Among the exemptions, vehicles manufactured in or before model year 2010 can become exempt based on the federal 10-year rule, while vehicles manufactured in or after model year 2011 generally use a 20-year period under 49 CFR 580.17. Other exemptions also exist. An exemption from a particular disclosure requirement should not be treated as proof that intentionally altering an odometer to deceive a buyer is lawful.

Can a buyer seek damages for odometer fraud?

Reporting suspected fraud to an enforcement agency is separate from pursuing compensation. Under 49 U.S.C. 32710, a person who violates the federal odometer chapter or its regulations with intent to defraud is liable for three times actual damages or $10,000, whichever is greater.

The statute allows a private action in an appropriate U.S. district court or another court of competent jurisdiction. The federal action must be brought no later than two years after the claim accrues. When judgment is entered for the claimant, the statute provides for costs and a reasonable attorney's fee.

State law may provide additional rights or remedies. The federal odometer statute generally does not displace state odometer-tampering law unless the state law is inconsistent with the federal chapter. Because filing deadlines and legal claims depend on the circumstances, a buyer considering a civil claim may wish to obtain legal advice promptly.

What should you do if you still own the vehicle?

Keep the evidence of the suspected discrepancy with the vehicle records. Do not alter documents or attempt to make the odometer match an earlier mileage record yourself.

If you later transfer the vehicle, comply with the mileage-disclosure rules that apply to that transfer. Federal odometer disclosure forms provide a specific warning for cases in which the displayed reading is not the vehicle's actual mileage.

Is odometer fraud the same as a safety defect or recall?

No. Odometer fraud concerns false or manipulated mileage and related disclosure requirements. A manufacturer safety recall or a vehicle defect follows a different NHTSA process.

If you also need to determine whether the vehicle has an unresolved recall, use the Helpydo guide to check the car's VIN for an open safety recall. For a safety problem that may represent a defect, see how to report a vehicle safety defect to NHTSA.

Common mistakes to avoid

  • Do not report an individual mileage dispute only as a general vehicle safety complaint. NHTSA specifically directs individual odometer-fraud cases to state enforcement agencies.
  • Do not rely only on the current dashboard reading. Compare it with the title and dated maintenance, inspection and vehicle-history records.
  • Do not discard the sales advertisement, title, disclosure statement or purchase documents after discovering a discrepancy.
  • Do not assume every mileage discrepancy proves intentional fraud. Preserve the evidence and report the facts accurately.
  • Do not assume the same agency handles individual complaints in every state. Use NHTSA's state enforcement directory.
  • If you are considering a federal civil claim, do not overlook the two-year statutory deadline after the claim accrues.

Frequently asked questions

Where do I report odometer fraud after buying a used car?

For an individual suspected odometer-fraud case, NHTSA directs you to the appropriate state enforcement agency and publishes a state-by-state directory. Large-scale odometer-fraud schemes can be reported to NHTSA's Vehicle Safety Hotline at 888-327-4236.

What evidence should I keep if I suspect the odometer was rolled back?

Keep the title, odometer disclosure, purchase documents and available records showing mileage. Compare the current odometer with title, maintenance, inspection and vehicle-history mileage entries.

Can I file an individual odometer fraud complaint directly with NHTSA?

NHTSA's current odometer-fraud guidance directs individual cases to the appropriate state enforcement agency. NHTSA asks people reporting large-scale odometer-fraud schemes to contact its Vehicle Safety Hotline.

Is rolling back a car odometer illegal?

Federal law prohibits disconnecting, resetting or altering a motor vehicle's odometer with intent to change the mileage registered by the odometer. Federal law also imposes mileage-disclosure requirements for covered vehicle transfers.

Can I recover money if I was intentionally defrauded about a car's mileage?

Federal law provides a private civil remedy when a person violates the federal odometer law with intent to defraud. The statutory amount is three times actual damages or $10,000, whichever is greater, and the federal claim must be brought no later than two years after it accrues.

Does an odometer discrepancy automatically prove fraud?

No. A discrepancy can be important evidence, but intentional fraud is a separate issue. Preserve the records and report the facts to the appropriate enforcement agency rather than assuming that every mismatch proves fraudulent conduct.

How long does an odometer fraud investigation take?

There is no single nationwide investigation time published for individual complaints. The responsible state agency handles individual cases, and procedures and timelines can differ by state.

Official sources

NHTSA - Odometer FraudNHTSA - State Enforcement Agencies for Odometer FraudU.S. House Office of the Law Revision Counsel - 49 U.S.C. Chapter 327, OdometersU.S. House Office of the Law Revision Counsel - 49 U.S.C. 32710, Civil Actions by Private PersonsGovInfo - 49 CFR Part 580 Odometer Disclosure Requirements and ExemptionsU.S. Department of Justice - Odometer Fraud and Motor Vehicle Investigatory Resources
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