Can You Dispute a Debt Sold to a Collection Agency?

Yes — you can dispute a debt after it has been sold to a collection agency, and federal law gives you two separate tracks for doing it. The Fair Debt Collection Practices Act lets you force the collector to prove you owe the money, and the Fair Credit Reporting Act lets you challenge how the account appears on your credit reports.¹ Disputing a debt sold to a collection agency works the same as disputing one still held by the original creditor: the sale does not erase any defense you already had.

Debt reaches a collector in one of two ways. In an assignment, the original creditor hires an agency to collect on its behalf. In a sale, a debt buyer purchases the account outright, usually at a steep discount, and becomes the legal owner. Either way, the new party inherits the debt subject to every defense you had against the original creditor. If the balance was already paid, discharged in bankruptcy, inflated by fees you never agreed to, or belonged to someone else, none of that changes because the account moved. Debt buyers often purchase accounts in bulk with thin documentation and may not have the original contract or statements. That gap is your leverage.

Your 30-Day Window to Demand Validation

Within five days of first contacting you, a collector must send a written validation notice listing the amount of the debt, the name of the creditor, and your right to dispute. You then have 30 days from receiving that notice to send a written dispute. If your dispute arrives within that window, the collector must stop all collection activity until it mails you verification of the debt or a copy of a court judgment.²

A few things trip people up. The dispute must be in writing, but the statute does not require certified mail. Send it certified anyway, with return receipt, so you can prove when the collector received it. Collection activity does not automatically pause when you get the notice; the halt only kicks in once your written dispute arrives. And skipping the 30-day window is not an admission that you owe the debt — no court can treat your silence as consent to the balance.² You can still dispute later; you just lose the automatic stop on collection while the collector verifies.

What the Validation Notice Must Contain

Under the CFPB’s Regulation F, which took effect in November 2021, the validation notice has to spell out the math. It must show an itemized breakdown starting from a specific reference date, with all interest, fees, payments, and credits applied since that date, so you can see how the collector arrived at today’s balance.³ The notice must also identify both the original creditor and the current creditor, along with any account number tied to the debt.

The collector picks the reference date from a short list of options (last statement, charge-off, last payment, original transaction, or court judgment).⁴ Whatever date they choose, the numbers between then and now have to reconcile. If they don’t, that’s a concrete basis for your dispute. Regulation F also requires built-in prompts with checkboxes for common responses like “This is not my debt” and “The amount is wrong.”⁵ You are not limited to those boxes. Attach a full written explanation and evidence.

How to Write and Send the Dispute

Identify the account by number, state clearly why you believe the debt is inaccurate or not owed, and attach copies (never originals) of anything that backs you up. Common grounds:

Identity theft. Someone else opened or used the account. Attach a police report or FTC identity theft affidavit.
Wrong amount. The balance includes unauthorized fees, miscalculated interest, or charges you never agreed to.
Already paid or settled. You paid the original creditor and the account was sold anyway. Include canceled checks, payment confirmations, or settlement letters.
Bankruptcy discharge. The debt was included in a bankruptcy and legally discharged. Attach the discharge order.
Statute of limitations expired. The debt is too old to be enforced through a lawsuit in your state.

Send the letter by certified mail with return receipt, and keep copies of everything, including the receipt. Once the collector receives a written dispute inside the 30-day window, collection has to stop until it sends verification. If the collector cannot verify the debt, it must stop collecting and correct or remove any related credit reporting.²

You can still write to the collector after the 30-day window closes. The automatic halt no longer applies, but the FCRA still bars a furnisher from reporting information it knows is inaccurate.

Check the Statute of Limitations Before You Say Anything

Every debt has a statute of limitations — the deadline after which a collector can no longer sue you. Depending on the type of debt and which state’s law applies, that window runs roughly 3 to 10 years. Under Regulation F, a collector is prohibited from suing or even threatening to sue on a debt after the statute has expired.⁶

Here’s the trap. In many states, making a partial payment on an old debt, or acknowledging in writing that you owe it, restarts the clock and gives the collector a fresh window to sue. A collector may ask for a small “good faith” payment for exactly that reason. If you think the debt may be time-barred, do not pay anything or put a promise to pay in writing until you have confirmed the deadline. The statute also depends on the terms of the original contract and can be affected by moves between states.⁷ Even after the statute runs out, collectors can still contact you. They just cannot use the courts to force payment.

Disputing With the Credit Bureaus

The FCRA gives you a separate dispute track with Equifax, Experian, and TransUnion. File with each bureau that shows the error, because they keep independent files.⁸ Send a letter identifying the account, explain what’s inaccurate, and attach supporting documents.

Once a bureau receives your dispute, it has 30 days to investigate and forwards your dispute and evidence to the collection agency as the “furnisher.”⁸ The investigation can extend to 45 days if you submit additional information during the initial 30-day window.⁹

The collection agency then investigates and reports back. If the information is inaccurate, incomplete, or unverifiable, the furnisher must correct or delete it and report the correction to every bureau where it was filed.¹⁰ If the collector simply doesn’t respond, the entry has to come off your report. During a pending dispute, the account must be flagged as disputed. If you disagree with the outcome, you can add a brief statement to your file explaining your side.¹¹

If the Collector Breaks the Rules

Continuing collection after a timely written dispute, or threatening suit on a time-barred debt, is an FDCPA violation. You can sue in state or federal court and recover your actual damages, statutory damages up to $1,000 per lawsuit, and reasonable attorney’s fees and court costs.¹² Willful FCRA violations carry statutory damages of $100 to $1,000, plus punitive damages the court sees fit to award, plus attorney’s fees.¹³

Watch the deadline. An FDCPA lawsuit must be filed within one year of the violation.¹⁴ Miss it and you lose the claim regardless of how clear the violation was. Because attorney’s fees are recoverable, many consumer lawyers take these cases on contingency. You can also file a complaint with the Consumer Financial Protection Bureau, which tracks collector misconduct.¹⁵

A Tax Note if the Debt Gets Canceled

If your dispute or a settlement wipes out $600 or more of the balance, the IRS generally treats the canceled amount as taxable income. The collector or creditor files a Form 1099-C, and you include that amount on your return.¹⁶ There are exceptions. If your total debts exceeded the fair market value of everything you owned right before the cancellation, you may qualify for the insolvency exclusion and exclude the canceled amount up to the extent you were insolvent, using IRS Form 982. Debt discharged in a Title 11 bankruptcy is also excluded.¹⁷ Factor a possible 1099-C into any settlement math before you agree.

1
Consumer Financial Protection Bureau. What Laws Limit What Debt Collectors Can Say or Do?
2
Office of the Law Revision Counsel. 15 USC 1692g – Validation of Debts
3
eCFR. 12 CFR 1006.34 – Notice for Validation of Debts
4
eCFR. Debt Collection Practices (Regulation F)
5
eCFR. 12 CFR 1006.34 – Notice for Validation of Debts
6
Consumer Financial Protection Bureau. 1006.26 Collection of Time-Barred Debts
7
Consumer Financial Protection Bureau. Can Debt Collectors Collect a Debt That’s Several Years Old?
8
Federal Trade Commission. Disputing Errors on Your Credit Reports
9
Office of the Law Revision Counsel. 15 USC 1681i – Procedure in Case of Disputed Accuracy
10
Office of the Law Revision Counsel. 15 USC 1681s-2 – Responsibilities of Furnishers of Information to Consumer Reporting Agencies
11
Consumer Financial Protection Bureau. What if I Disagree With the Results of My Credit Report Dispute?
12
Office of the Law Revision Counsel. 15 USC 1692k – Civil Liability
13
Office of the Law Revision Counsel. 15 USC 1681n – Civil Liability for Willful Noncompliance
14
Federal Trade Commission. Fair Debt Collection Practices Act Text
15
Consumer Financial Protection Bureau. Submit a Complaint
16
Internal Revenue Service. Instructions for Forms 1099-A and 1099-C
17
Internal Revenue Service. Publication 4681 – Canceled Debts, Foreclosures, Repossessions, and Abandonments