To dispute a debt, send the collector a written dispute letter within 30 days of receiving its validation notice, spell out the specific errors, and attach copies of documents that back you up. That timing is not a formality. A written dispute inside the 30-day window forces the collector to stop all collection activity until it obtains verification of the debt and mails that verification to you.1Office of the Law Revision Counsel. 15 USC 1692g: Validation of Debts Miss the window and you can still dispute later, but you lose that automatic pause.
The 30-Day Validation Window
Within five days of first contacting you, a debt collector must send a written validation notice listing the amount of the debt, the name of the creditor, and your right to dispute it within 30 days.1Office of the Law Revision Counsel. 15 USC 1692g: Validation of Debts Under the CFPB’s Regulation F, the notice must also break down interest, fees, payments, and credits since an itemization date.2Consumer Financial Protection Bureau. 1006.34 Notice for Validation of Debts Read this notice the day it arrives. The 30 days runs from when you receive it, not from when you get around to opening the envelope.
If you dispute in writing within those 30 days, collection has to pause until the collector sends you verification. If you miss the deadline, the collector can treat the debt as valid for its own purposes, but that is not an admission from you and you can still dispute after the fact.1Office of the Law Revision Counsel. 15 USC 1692g: Validation of Debts
Gather Your Evidence First
Before you draft anything, pull your records. Set the validation notice next to your bank statements, payment receipts, and the last billing statement you received from the original creditor. You are hunting for specifics: a balance that doesn’t match, an account number you don’t recognize, charges added after you paid the account in full, or a debt that isn’t yours at all. A small math error is a legitimate basis for dispute.
Check the statute of limitations for your state. Most states set the period between three and six years, though some go longer depending on the type of debt and the original agreement.3Consumer Financial Protection Bureau. Can Debt Collectors Collect a Debt Thats Several Years Old Find the date of your last payment or activity on the account. A collector can still ask you to pay a time-barred debt, but it generally cannot sue you for it.
If the debt looks like the result of identity theft, file an Identity Theft Report at IdentityTheft.gov and pull any correspondence from your bank or the Social Security Administration that supports the claim.
Write the Dispute Letter
Keep the letter direct. Include the collector’s name, the account number from the validation notice, and a plain statement that you are disputing the debt. Then list each error you found: the wrong balance, the wrong creditor, an uncredited payment, whatever the record shows. Vague disagreement is weaker than a pinpointed factual problem.
Attach copies, never originals, of the documents that support you: bank statements, a paid-in-full letter, an identity theft report. Ask the collector to provide proof the debt is valid, including a copy of the original signed agreement. If you also want the dispute reflected on your credit reports, say the dispute is being made under both the FDCPA and the FCRA, and send a separate dispute directly to each credit bureau that is reporting the item. When a bureau receives a dispute, it must investigate for free and either correct or delete the item within 30 days, extendable by 15 days if you provide new information during the investigation.4Office of the Law Revision Counsel. 15 USC 1681i: Procedure in Case of Disputed Accuracy
If You Also Want Contact to Stop
You can include a written cease-and-desist request in the same letter. Once the collector receives it, it must stop communicating with you except to confirm it is ending collection, to notify you that it or the creditor may pursue a specific legal remedy, or to say it intends to take a specific action such as filing a lawsuit.5Office of the Law Revision Counsel. 15 USC 1692c – Communication in Connection With Debt Collection Silencing the collector does not erase the debt. If the statute of limitations hasn’t run, the collector or original creditor can still sue.
How to Send It
Use USPS Certified Mail with Return Receipt Requested. That gives you a dated record proving the collector or bureau received your letter, which is what you need to enforce the 30-day response clock. As of 2026, certified mail costs $5.30 and the return receipt adds $4.40 for a physical green card or $2.82 for electronic confirmation, so the paper trail runs roughly $8 to $10 before regular postage.
Equifax, Experian, and TransUnion also accept disputes through online portals where you can upload documents. If you file online, save or print the confirmation page and the reference number. Log the date and any tracking information the same way you would for a mailed letter, because you’ll need it to follow up if the response window closes without an answer.
What Has to Happen After You File
Once the collector receives a written dispute inside the 30-day window, all collection activity stops: no calls, no letters demanding payment, no new negative reporting, until the collector obtains verification and mails it to you.1Office of the Law Revision Counsel. 15 USC 1692g: Validation of Debts A collector that contacts you during that pause without first providing verification is violating federal law.
Credit bureaus move on a parallel track. After receiving your dispute, a bureau must notify the furnisher of the information within five business days.4Office of the Law Revision Counsel. 15 USC 1681i: Procedure in Case of Disputed Accuracy The furnisher investigates your evidence and reports back. If the item is inaccurate, incomplete, or unverifiable, the furnisher has to correct or delete it.6Office of the Law Revision Counsel. 15 USC 1681s-2: Responsibilities of Furnishers of Information to Consumer Reporting Agencies The whole process finishes inside 30 days, or 45 if you added information mid-investigation.
Reading the Results
The collector’s response has to include proof the debt is owed, usually the original account agreement or a detailed ledger. If the collector can’t produce that documentation, it generally can’t keep collecting.
Credit bureau results usually come back as one of three outcomes. Deleted means the item is gone from your file. Updated means the information was partially corrected, such as an adjusted balance or a changed account status. Verified means the bureau concluded the original information was accurate.
A verified result isn’t the end of the road. You can add a brief statement to your credit file explaining the dispute, re-dispute with new evidence, escalate to a federal agency, or talk to an attorney about a possible FDCPA violation. Pull a fresh copy of your report from AnnualCreditReport.com, where free weekly reports are available from all three bureaus.7Federal Trade Commission. Free Credit Reports
Don’t Accidentally Revive an Old Debt
On older debts, watch your words. In many states, a partial payment on a time-barred debt, a promise to pay, or a written acknowledgment that you owe it can reset the statute of limitations and give the collector a fresh window to sue for the full amount.8Federal Trade Commission. Debt Collection FAQs What triggers revival varies. Some states accept a verbal acknowledgment; others require a written promise or an actual payment.
Your dispute letter should never contain language that reads as admitting you owe the debt. Stick to asking for verification and pointing out factual errors. “I do not believe this debt is accurate” is safer than “I can only pay part of this.” If a collector calls about a very old debt, don’t discuss payment plans or make commitments until you’ve confirmed whether the statute of limitations has expired.
If the Collector Won’t Cooperate
When a collector ignores your dispute, keeps collecting during the verification pause, or refuses to correct confirmed errors, file a complaint with the Consumer Financial Protection Bureau at consumerfinance.gov/complaint. The form takes about ten minutes, and you can attach up to 50 pages of documents, including your dispute letter, the certified mail receipt, and any responses you did or didn’t get.9Consumer Financial Protection Bureau. Submit a Complaint
The CFPB forwards the complaint to the company and requires a response, typically within 15 days and up to 60 days in complex cases. You track the status through the CFPB portal. Filing a complaint doesn’t block a lawsuit; it just adds a federal paper trail to it.
If the collector’s conduct crossed the line—continuing to collect during a verification pause, misstating the amount, contacting you after a cease-and-desist, harassment—you can sue in federal or state court. Under 15 U.S.C. § 1692k, you can recover actual damages, statutory damages up to $1,000 per lawsuit even without proof of actual harm, and attorney’s fees and court costs if you win.10Office of the Law Revision Counsel. 15 USC 1692k – Civil Liability The deadline to file is one year from the violation. Because the collector pays your legal fees when you win, many consumer-rights attorneys take these cases on contingency with no upfront cost. A collector that made a genuine clerical error in good faith may have a defense, but the burden of proving that sits with the collector.
If a Successful Dispute Cancels the Debt
One consequence to know about before it surprises you. If a creditor cancels or forgives $600 or more of debt, it files IRS Form 1099-C and the cancelled amount is treated as taxable income.11Internal Revenue Service. Instructions for Forms 1099-A and 1099-C The IRS treats cancelled debt as gross income under 26 U.S.C. § 61.12Office of the Law Revision Counsel. 26 USC 61 – Gross Income Defined
There is an exception if you were insolvent when the debt was cancelled, meaning your total liabilities exceeded the fair market value of your total assets. You can then exclude the cancelled amount from income up to the extent of your insolvency by filing IRS Form 982 with your return.13Office of the Law Revision Counsel. 26 USC 108 – Income From Discharge of Indebtedness If a 1099-C shows up in your mail, don’t ignore it, and don’t assume you owe tax on it either.