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How do I dispute a debt in writing?

Updated July 1, 2026United States

Short answer

Send the collector a written dispute that says who you are, the account or reference number, that you dispute the debt, and that you're requesting validation — and send it by a trackable method so the sending is on record. Under the federal FDCPA, if you dispute in writing (generally within 30 days of the collector's first notice, per the CFPB), the collector must usually stop collecting until they verify the debt. Keep it factual, don't admit the debt is yours, and keep a copy of everything. The CFPB offers sample letters you can adapt.

A written dispute is your single most powerful tool with a collector: it's a right, it can pause collection, and it forces them to show what they are relying on. Here's how to do it cleanly.

Step by step

  1. Act within the validation window

    The FDCPA gives you the strongest footing when you dispute in writing generally within 30 days of the collector's first written notice, according to the CFPB. You can still dispute later, but within that window the collector must generally pause collection until they verify. If unsure of your timing, check the CFPB.

  2. Include the key details

    State your name and address, the collector's name and any account or reference number, a clear statement that you dispute the debt, and a request that they validate it. Keep it short and factual — no need to explain your finances or admit anything.

  3. Don't admit the debt

    Word it as a dispute and a request for verification, not an acknowledgment. Avoid promising to pay or making a partial payment, since in some states that can restart the statute of limitations on an old debt.

  4. Use a template if it helps

    You don't need legal language. The CFPB publishes sample debt-dispute and validation letters you can adapt to your situation — a reliable starting point that covers what to include.

  5. Send it so you can show it

    Send by a method that gives you proof of mailing and delivery, such as certified mail with return receipt, and keep the receipt. A dated record of sending it is what makes the dispute count if the collector later ignores it.

  6. Know what should happen next

    After a timely written dispute, the collector should generally stop collection efforts until they send you verification of the debt. If they keep collecting without validating, that may itself be an FDCPA violation you can report to the CFPB.

  7. Keep copies and track the response

    Save your letter, the mailing receipt, and whatever the collector sends back, and note the dates. If they validate, compare it to your records; if they don't respond or keep pressing, you have grounds to escalate.

Plain-English terms

Debt validation letter
A written request asking a collector to verify a debt — the amount, the original creditor, and that they're pursuing the right person. It's your FDCPA right; the CFPB has sample letters.
Validation window
The period — generally within 30 days of the collector's first notice, per the CFPB — in which a written dispute gives you the strongest FDCPA protection and can pause collection. Timing details are worth confirming with the CFPB.
Verification
What the collector must generally provide after a timely dispute — documentation of the debt — before resuming collection. If it doesn't match your records, you can dispute further.
Certified mail / proof of delivery
A mailing method that documents that you sent a letter and when it arrived. It turns 'I disputed it' into something you can show.
FDCPA (Fair Debt Collection Practices Act)
The federal law giving you the right to dispute and demand validation of a debt from a third-party collector. The CFPB enforces it and publishes guidance and sample letters.

Related questions

This is general information to help you keep your own records — not legal advice. Dispute and validation rights come from the federal FDCPA, and timing and the statute of limitations can vary — check the CFPB and your state's rules, and consider legal help for your situation.