Debt validation letter for a medical bill in collections

Updated October 1, 2026 · How we write our guides

When to use it

Use this letter to dispute a medical debt with a collector and ask for proof. Send it within 30 days of getting the collector's validation notice. Once the collector gets your written dispute, it must stop collecting until it sends you verification. Send it by certified mail and keep a copy.

A collection notice isn't the end of the road. You have rights, and this letter helps you use them. It disputes the debt and asks the collector to prove it before you pay. Our guide to a medical bill in collections explains every step. It's part of our guide to what to do when you can't afford medical bills.

When to use this letter

Use it when a debt collector contacts you about a medical bill and something looks wrong or unfamiliar. Maybe you don't recognize the provider, or the amount doesn't match your records. It's worth sending even if you're only unsure.

Hold off on paying or agreeing that you owe it until you've checked. Keep a log of every call, with the date, the person's name, and what they said.

Check your 30-day deadline

A collector must send you validation information when it first contacts you, or within 5 days after. It lists the collector, the creditor, the amount, and your rights.

The notice must also give the date your 30-day window ends. If you dispute in writing by that date, the collector must stop collecting until it sends you verification. If you ask in writing for the original creditor's name and address by that date, it must also pause until it sends them. Mark the date on your calendar, and mail your letter early.

What to fill in

Collector name and address: on the validation notice.
Reference number: the account or reference number the collector uses.
Amount and notice date: copy them from the notice.
Reason: say it plainly. For example: "This is not my debt," "The amount is wrong," or "I don't recognize this provider."

Leave out your Social Security number, your bank or card numbers, and details about your health. The collector can find your account with its reference number.

Fill in your details

Optional. What you type stays on this page. We don't save it or send it anywhere.

Your name

Your address

City, state ZIP

Today's date

Collector name

Collector address

Collector reference number

Amount on notice

Date of validation notice

Your reason, like not my debt or wrong amount

Your letter

[YOUR NAME] [YOUR ADDRESS] [CITY, STATE ZIP] [TODAY'S DATE] [COLLECTOR NAME] [COLLECTOR ADDRESS] Sent by certified mail, return receipt requested Re: Dispute of debt and request for verification Reference number: [COLLECTOR REFERENCE NUMBER] Amount on your notice: $[AMOUNT ON NOTICE] Date of your notice: [DATE OF VALIDATION NOTICE] To [COLLECTOR NAME]: I am writing about your notice dated [DATE OF VALIDATION NOTICE]. I dispute this debt. My reason: [YOUR REASON, LIKE NOT MY DEBT OR WRONG AMOUNT] Please send me: 1. Proof that I owe this debt, such as a copy of the original bill 2. An itemized bill that lists each charge, the date of each service, and any insurance payments or adjustments 3. The name and address of the original creditor Please stop collection of this debt until you send me this information. This letter is not an agreement that I owe this debt. Please send your reply in writing to the address above. Sincerely, [YOUR NAME]

Highlighted words are blanks you haven't filled in yet.

What to attach

You don't have to attach anything. If you have records that support your dispute, send copies, not originals. That could be a receipt showing you paid, or an explanation of benefits (EOB) showing a different amount.

How to send it

Send it by certified mail with a return receipt. That gives you proof of the date the collector got it. Keep a copy of the letter and the receipt with the collection notice.

If the notice lists an email address or website for disputes, you can use that too. Save a copy of what you sent, with the date.

What happens next

Once the collector gets your dispute, it must stop collecting the debt, or the part you dispute, until it sends you verification. When it arrives, compare it with your own records and your insurance statements.

While you wait, keep working on the original bill:

Look for errors. Our guide on how to dispute a medical bill shows what to check.
Ask about financial assistance. A bill in collections can still qualify. See hospital charity care, and use our financial assistance request letter to apply.
Check your credit report. Our guide to medical debt and your credit report explains the current rules.

If the collector keeps trying to collect before it answers, keep your records. You can report it to the Consumer Financial Protection Bureau (CFPB), the Federal Trade Commission, or your state attorney general. If you're sued, respond by the date on the court papers, and contact legal aid.

Common questions

How long do I have to send a debt validation letter?

You have 30 days after you get the collector's validation notice. The notice must list the date your 30 days end. If you dispute in writing by that date, the collector must stop collecting the debt, or the part you dispute, until it sends you verification. Mail your letter early so it arrives in time.

Does sending this letter mean I agree I owe the debt?

No. This letter disputes the debt and asks for proof. It doesn't promise to pay. Be careful about what you say on the phone, too. In some states, a payment or a written statement that you owe a debt can restart the time limit for a lawsuit. Check your state's rules before you pay on an old debt.

Can I dispute a debt by email or online?

Often, yes. A dispute counts as written if you send it in a way the collector accepts, like email or a website portal. Your validation notice should explain how. If you dispute online, save a copy or screenshot of what you sent, with the date. Certified mail with a return receipt is still the clearest proof.

What should I do while I wait for an answer?

Keep working on the original bill. Ask the provider for an itemized bill, and check it against your explanation of benefits if you have insurance. Ask whether the hospital has financial assistance. Keep a log of every call, with the date, the person's name, and what they said.

Sources

12 CFR 1006.34: Notice for validation of debts (Regulation F), Consumer Financial Protection Bureau. Accessed October 1, 2026.
12 CFR 1006.38: Disputes and requests for original-creditor information (Regulation F), Consumer Financial Protection Bureau. Accessed October 1, 2026.
Debt collection FAQs, Federal Trade Commission. Accessed October 1, 2026.
What should I know about debt collection and credit reporting if my medical bill was sent to collections?, Consumer Financial Protection Bureau. Accessed October 1, 2026.
Can debt collectors collect a debt that's several years old?, Consumer Financial Protection Bureau. Accessed October 1, 2026.

This is general information, not legal or medical advice. Rules can depend on your plan and your state. Romi Care isn't an insurer, law firm, collection agency, or government program.