What to document for a defect or lemon law claim
Last updated: June 28, 2026
Lemon law and warranty defect claims are won on documentation. The more complete your paper trail, the stronger your position, whether you’re pursuing a buyback, a replacement, or just a stubborn repair the dealer keeps botching. This guide lists exactly what to collect and how to keep it.
For how these records fit into a claim, see recall vs. lemon law and how many repair attempts before lemon law applies?.
Step 1: Keep every repair order
The repair order is the single most important document you have. Get a written repair order (RO) for every visit, including diagnostic trips and times the dealer says “no problem found.” Each RO should show the date, the mileage in and out, the symptom you reported, and the diagnosis and work performed.
These documents are what prove how many times you brought the car in and that you reported the same defect each time. State guides such as the New York Attorney General’s new car lemon law guide describe how repair attempts and written records anchor a claim. Ask for a printed or emailed copy before you leave, every time.
Step 2: Track days out of service
Count and record every day your car sits at the shop. Many lemon laws have a separate trigger of roughly 30 cumulative days out of service, independent of the number of repair attempts. Note the drop-off and pickup date for each visit, and keep any loaner agreement, which documents the dates too.
Because these days are usually cumulative rather than consecutive, a running total matters. A week here and ten days there can add up to a threshold you’d otherwise miss.
Step 3: Photograph and record the defect
Capture the defect itself, not just the paperwork. Take photos and video of the problem, record audio of unusual noises, and snap pictures of dashboard warning lights with the date visible. This evidence is most valuable for intermittent problems, the kind a dealer often “can’t duplicate.”
Concrete proof that the defect is real makes it far harder for a manufacturer to wave away your reports.
Step 4: Save all written communication
Keep a copy of everything in writing. Save every email, text message, letter, and service-portal message with the dealer and the manufacturer. For phone calls, jot down the date, who you spoke with, and what was said.
This record shows when you put the manufacturer on notice, what you were promised, and any runaround you got along the way.
Step 5: Log dates, mileage, and symptoms consistently
Keep one simple, running log of the whole history. For each event, record the date, the odometer reading, what happened, and who you dealt with. Describe the defect the same way every time so your repair attempts clearly point to a single, ongoing problem.
A clean timeline is persuasive on its own, and it makes the rest of your evidence easy to follow.
Step 6: Send written notice and keep proof
Put the manufacturer on formal notice in writing. Many states require you to give the manufacturer a final opportunity to repair before you can file, so send that notice by a trackable method and keep a copy along with the delivery receipt. The manufacturer’s response, or its silence, becomes part of your record.
A quick documentation checklist
Keep these together in one folder, digital or physical:
- Every repair order, including diagnostics and “no problem found” visits
- Drop-off and pickup dates, plus loaner agreements, for the days-out-of-service total
- Photos, video, and audio of the defect and any warning lights
- All emails, texts, letters, and notes from phone calls
- A running timeline of dates, mileage, and symptoms
- Your written notice to the manufacturer and proof of delivery
If your defect is a safety issue, also report it to NHTSA and save your submission. You don’t need a recall to have a claim, as explained in does lemon law cover a safety defect with no recall?
Frequently asked questions
What’s the single most important thing to document?
Repair orders. They establish the number of repair attempts, the mileage, and the fact that you reported the same defect each time, which is the backbone of any lemon law claim.
What if the dealer won’t give me a repair order?
You’re entitled to one. Ask again, and if you still don’t get it, follow up in writing (email is fine) summarizing the visit so there’s a dated record either way.
Do “no problem found” visits count?
Yes. A documented visit usually counts as a repair attempt even when the dealer couldn’t duplicate or fix the issue, so keep that repair order too.
How do I prove days out of service?
Use the drop-off and pickup dates on your repair orders and any loaner agreements. A running total of those dates is your proof.
Do I need a lawyer before I start documenting?
No. Start documenting from the very first visit. A strong record makes any later claim easier, whether or not you eventually hire an attorney.
How long should I keep these records?
At least through your warranty period and the life of any claim. If you’re actively pursuing a buyback or replacement, keep everything until the matter is fully resolved.