Insurance appeal letter
By Justin Winter · Updated August 20, 2026
The short answer
An insurance appeal has to be filed within the deadline your policy sets. Send it Certified with electronic Return Receipt, $14.99 all-in: USPS records when it was mailed and when it was signed for. Preview the exact pages free. This template is not legal advice.
The math
The math on one certified letter.
| Option | Cost | Your time |
|---|---|---|
| paperplane, Certified + Return Receipt | $14.99, all in | About two minutes |
| At the counter | USPS fees, plus printing, an envelope and the trip | About ten minutes at the counter, plus the drive and the line |
USPS charges the same fees whoever hands the letter over. The difference is the trip, the form and the slip you keep for a year.
Insurance appeals run on a clock — often 30 to 180 days from the denial, set by your policy or state law. Miss it and the appeal may not be considered at all, no matter how strong your case is.
What to attach
- The claim and policy numbers, and the exact reason given for denial.
- Why you believe the denial is wrong — cite the policy language if you can.
- Supporting documents: itemized bills, medical records, a doctor's letter of necessity.
How it works
- Open the template, fill in the claim details and your explanation.
- Pay $14.99 (Certified + Return Receipt) — mailed the next business day.
- Keep the delivery record; it is your proof the appeal was filed on time.
This template is a tool, not legal or medical advice. If this appeal is denied too, many states give you the right to an external review — check with your state's insurance department.
Questions before you send
Why not go to the post office myself?
You can, and if your time is free it costs less. USPS charges the same fees whoever hands the letter over; paperplane does not replace the post office, it replaces the trip. The mailing record comes from USPS, not from us. $12.99 covers the printing, the envelope, PS Form 3800, a USPS address check before you pay and a handoff the next business day. For a letter you already know how to send, the counter is a fine choice.
What if they refuse the letter?
USPS tracking records what happened to it, including refused or unclaimed. You still have the mailing record. Rules on what that means vary, so check with your court or an attorney if a deadline depends on it.
If something goes wrong, do I pay?
If we cannot mail the letter, the hold on your card is released and you are not charged. If a letter fails after your card is charged, you are refunded automatically and in full.
Why does the delivery date matter for an appeal?
Insurance appeals almost always run on a strict clock — often 30 to 180 days from the denial, depending on the policy and state. A certified mail receipt is your proof of exactly when you filed, in case the insurer later claims it arrived late or not at all.
What should I include with the letter?
The claim and policy numbers, the stated denial reason, why you believe it is wrong, and copies of supporting documents — medical records, itemized bills, or a doctor's letter of medical necessity.
Is this legal advice?
No — it is a template, not legal or medical advice. If an appeal is denied again, you may have a right to an external review; check your policy or your state's insurance department.