Insurance dispute

A denied claim is a first answer, not the last one — but only if you appeal in writing, on time

Insurers decide appeals on a file. What is in the file is what you put there, in writing, before the deadline. A phone call adds nothing to it. This page is about building that file: getting the denial and the policy language in writing, answering the stated reason rather than the outcome, and sending it so that nobody can later say it arrived late or not at all.

Get three things in writing before you write anything

1. The denial itself, with the specific reason and the policy provision it relies on. If you were told by phone, request it in writing; insurers are generally required to state a reason.
2. The policy language that provision refers to — the actual wording, not the summary.
3. The appeal deadline and the appeal address. These come from the denial letter and the policy. For a health plan offered through an employer, federal rules under ERISA generally give at least 180 days to appeal an adverse benefit determination and require the plan to tell you how. Property, auto and life policies run on their own contractual and state-law clocks, which can be much shorter.

Do not let the deadline run while you wait for a call back. Send the appeal, then keep talking.

What the appeal letter must contain

1. The identifiers. Policy or member number, claim number, date of loss or service, provider or property, and the date of the denial letter.
2. The stated reason, quoted. Answer the reason they gave. An appeal that argues a different point than the denial is not an appeal; it is a new claim.
3. Why it is wrong, on the policy’s own words. Quote the provision and show that the facts meet it, or that the exclusion they used does not reach these facts.
4. The evidence, listed and enclosed. Medical records and a letter from the treating physician; photographs, receipts, a repair estimate, an independent adjuster’s report. Each item named in the letter and numbered in the enclosures.
5. What you ask for. That the claim be paid in the amount of $[figure], or reprocessed, by a calendar date.
6. What follows. The next level of appeal, external review where the policy or state law provides one, and a complaint to your state’s department of insurance.

Sample appeal letter

Why the mailing record matters more here than almost anywhere

Appeals turn on deadlines. The single most common way a good appeal fails is a dispute about when — or whether — it was received, and the file the insurer later produces is the insurer’s file. Certified Mail creates a mailing date recorded by the Postal Service and, with the electronic return receipt, a signature. Keep the exact letter and its enclosures beside that record; if the appeal goes to external review or to a regulator, the first thing you will be asked for is what you sent and when.

Send it to the appeals address in the denial letter, not to the general correspondence address, and put the policy and claim numbers on the letter itself so it cannot be separated from its file.

If the appeal is refused

The denial of an appeal should name the next step. Depending on the policy and the state that can be a second-level internal appeal, an independent external review, appraisal or mediation for a property claim, or a complaint to your state’s department of insurance, which regulates the insurer and takes consumer complaints directly. For an employer health plan, the federal rules that set the appeal timetable also set what the plan must disclose when it upholds a denial — ask for all of it, in writing, in the letter above.

What you end up holding

• The exact letter that was approved, kept unchanged, with the fingerprint that shows it is the same file.
• The recipient address as it was printed, after the postal check.
• The mailing record: the service that was bought, when the letter was handed over to be printed and mailed, and the reference the printer gave it.
• The sentence you authorized, and the time you authorized it.

You are buying USPS Certified Mail, so the Postal Service keeps its own delivery record. Piloxa asks the printing partner for that history on its own, without anyone pressing anything, and adds each scan to your record as it is reported, naming where it came from. If you chose the return receipt, the signature of whoever accepted the letter is recorded the same way once USPS releases it. Where nothing has come back, the record says “no record yet” rather than guessing. The sample record shows every state, including the incomplete ones.

Certified Mail proves that something was delivered. It does not prove what was inside. Keeping the approved letter beside the mailing record is what closes that gap, and it is the whole reason this exists. See a filled-in record.

Common questions

How long do I have to appeal a denied claim?

It depends on the policy and the type of insurance. For a health plan offered through an employer, federal rules under ERISA generally give at least 180 days to appeal an adverse benefit determination. Property, auto and life policies run on their own contractual and state-law deadlines, which can be far shorter. The denial letter has to tell you; read it first.

Does appealing in writing actually change anything?

It is the only thing that reliably does. The appeal is decided on a file, and a phone call adds nothing to that file. A written appeal that answers the stated reason with the policy’s own wording, with the evidence attached, is what a reviewer has to respond to.

What if they deny the appeal too?

The refusal should name the next step: a second internal appeal, an independent external review, appraisal or mediation on a property claim, or a complaint to your state’s department of insurance. Ask in the letter for the written basis and the policy provisions relied on, so you have them for whichever comes next.

Should I send the medical records with it?

Send what supports the point the denial turns on, named in the letter and numbered in the enclosures. Put the letter and the enclosures into one PDF and attach it on the review page; it is printed exactly as you send it.

What does it cost to send?

$13.18 all in for a one-page letter by USPS Certified Mail, or $16.17 all in with the electronic return receipt. Printing, envelope and postage are included, and a longer appeal with enclosures costs a little more per sheet.

Do I need a lawyer?

Not to file a first appeal, and waiting for one can cost you the deadline. When the amount is large, the policy is complex, or a second denial follows, a lawyer who works on insurance claims is worth the consultation.

Primary sources

• US Department of Labor, Employee Benefits Security Administration: claims and appeals under ERISA
• USPS Postal Explorer: what Certified Mail documents

Legal and postal references last reviewed September 18, 2026. Requirements vary by claim and jurisdiction.

Other letters people send certified

• Demand letters generally
• Refund demands
• Contractor disputes
• Notice of intent to sue
• Send a certified letter
• What Certified Mail proves