Diminished Value Demand Letter
A diminished value demand letter is how you turn “my car is worth less now” into a specific, documented claim an adjuster has to answer. Here's what to include, and a template you can adapt.
What a good demand letter does
The letter has one job: put a specific number, backed by evidence, in front of the insurer in writing. Vague complaints get vague responses; a clear demand with a figure, a method, and attachments forces a real answer — and starts your paper trail if you later escalate.
What to include
- Your claim details — claim number, date of loss, vehicle, and the at-fault party.
- A specific demand amount — your diminished value figure, not a range.
- Your method — the 17c estimate and/or a licensed appraisal, so the number isn't arbitrary.
- Evidence attachments — repair invoice, pre-accident value, and comparable listings.
- A response deadline — a reasonable date (e.g., 14 days) by which you expect a reply.
Free template
[Your name] · [address] · [phone] · [email] · [date]
[Insurer name], Claims Department
Re: Diminished Value Demand — Claim #[claim number], Date of Loss [date]
To whom it may concern,
On [date], your insured, [at-fault driver], was at fault in a collision that damaged my [year make model, VIN]. The vehicle has been repaired, but it has suffered diminished value — a permanent loss in resale value that remains after repair because the accident appears on its history report.
Based on the 17c methodology and the supporting evidence attached, I am demanding $[amount] in diminished value. My pre-accident market value was $[value], the repair cost was $[repair], and comparable listings show the post-accident market impact.
Enclosed: repair invoice; pre-accident valuation; [appraisal, if any]; comparable listings. Please respond within 14 days of the date of this letter. I am prepared to escalate to the [state] Department of Insurance or small-claims court if we cannot resolve this fairly.
Sincerely,
[Your name]
Use the free 17c calculator to produce the specific figure your demand letter needs — no email.
Open the Diminished Value Calculator →Frequently asked questions
How do I write a diminished value demand letter?
Include your claim number and vehicle details, a specific demand amount, the method behind it (a 17c estimate and/or licensed appraisal), evidence attachments (repair invoice, pre-accident value, comparable listings), and a reasonable response deadline. Keep it factual and in writing.
Who do I send a diminished value demand letter to?
In the common third-party case, send it to the at-fault driver's insurer's claims department, referencing your claim number. If you're pursuing a first-party claim in a state that allows it, send it to your own insurer.
How much should I demand?
A specific figure, not a range. Many people start from the 17c estimate as a defensible floor and support a higher number with a licensed appraisal and comparable listings, since 17c is designed to be conservative.
What if the insurer ignores or lowballs my demand letter?
Follow up in writing, then escalate: invoke your policy's appraisal clause where available, file a complaint with your state Department of Insurance, or take it to small-claims court with your evidence.
What to do next
Disclaimer: This guide is educational and independent. AntiFraud News is not affiliated with, endorsed by, or representing any insurer; company names are used only to identify them for consumers. This is not legal advice; diminished value rules depend on your state and policy. For a binding figure or advice, consult a licensed appraiser or attorney and confirm rules with your state Department of Insurance.