If a debt collector's conduct concerns you, document it first, then use the complaint route that fits the problem:

A complaint can create a record and sometimes lead to a company response. It does not decide whether you owe the debt, erase a balance, correct a credit report by itself, award damages, or stop a court case. If you received a summons or other court papers, follow the response deadline on those papers even while a complaint is pending.

Know what rule may apply

The Fair Debt Collection Practices Act (FDCPA) generally covers third-party businesses collecting personal, family, or household debts. That can include collection agencies, debt buyers, and attorneys who regularly collect consumer debts.

It usually does not cover an original creditor collecting its own account under its own name. That does not mean the creditor has no limits: state law, credit-reporting rules, and other consumer-protection laws may still matter.

The FTC's debt collection FAQ and the FDCPA text set out the federal baseline. State protections can be broader.

A complaint is stronger when it identifies conduct, dates, and evidence. Instead of writing only "the collector harassed me," describe what happened. Examples that may raise concerns include:

A legitimate debt does not excuse deceptive or abusive collection tactics. At the same time, a call is not automatically unlawful just because it is unwanted or because the collector contacted you more than once. The timing, wording, frequency, recipient, and full sequence of events matter.

Start with a dated evidence file

Before filing anything, gather the records that show who contacted you and what occurred. Keep originals where possible and send agencies copies.

Your file may include:

Write down exact language used in threats or misleading statements while it is fresh. Save original electronic files as well as screenshots, and do not alter either.

Do not rely only on caller ID. Compare the caller's details with the validation notice, a prior statement from the original creditor, or your credit report. If someone refuses to identify the company or demands payment without basic account information, record that too.

Be careful with sensitive information. Redact full Social Security numbers, bank login details, and unrelated account numbers before uploading documents. Use only the last four digits of an account number when that is enough to identify the account.

Do not assume you can legally record a call. Recording-consent rules vary by state and can become more complicated when callers are in different states. Written notes and saved voicemails are useful evidence if you are unsure.

Send a written debt dispute if the account information is wrong

A debt dispute and a conduct complaint do different jobs.

A complaint tells an agency about the collector's conduct. A written dispute tells the collector that you challenge the debt, its amount, or some other part of the account information.

A collector generally must provide validation information in its first communication with you or within five days afterward. If you dispute the debt in writing within 30 days after receiving that information, the collector generally must stop collecting the disputed portion until it sends verification.

State clearly whether you dispute all of the debt or only part of it. Explain the reason in plain terms: the debt is not yours, the amount is wrong, it was paid, the account belongs to someone else, or you need information to identify it.

Missing the 30-day period does not establish that you owe the debt. It can, however, affect the federal rule requiring the collector to pause collection after a written dispute. You can still dispute inaccurate information and report improper conduct after that period.

Send the dispute to the address in the validation notice. Use a delivery method that gives you a record, such as certified mail with tracking, and keep copies of the letter, attachments, and delivery confirmation.

You can adapt this wording:

Subject: Written dispute of account [account number or last four digits]

I dispute this debt [in full or in part]. Please provide the validation information required by federal law, including the current amount, the name and address of the current creditor, and information identifying the account.

This letter is not an acknowledgment that I owe the debt. Please mark the account as disputed and send your response to the address above.

Sincerely,
[Your name]

A written dispute is not the same as a request to stop all contact. If you want communications to stop, make a separate written cease-communication request or state that request clearly in the letter. After receiving that request, a collector may still communicate for limited purposes, such as telling you that collection efforts will stop or notifying you about a specific remedy it may pursue. A stop-contact request does not cancel a valid debt or prevent a lawsuit.

File the complaint with the right agency

CFPB: the main federal complaint route

Use the CFPB complaint portal for a complaint about a debt collector's conduct, account handling, or related credit-reporting issue.

The form generally asks for the collector's identity, the original creditor if known, account details, the dates of contact, what happened, and the resolution you want. Attach supporting documents if the portal allows them.

Write a short chronology rather than a long argument. For example:

On March 3, the collector called my mobile phone at 6:42 a.m. On March 5, I mailed a written dispute and have delivery confirmation. On March 8 and March 10, the company again attempted to collect the disputed amount without sending verification. I attached my dispute letter, delivery record, and call log.

Ask for a practical outcome: an investigation, accurate account information, correction of reporting that cannot be verified, or communications that follow your written instructions.

The CFPB may send your complaint to the company for a response. Review the narrative and attachments before submitting them, since the company may receive information needed to address the complaint. Save the confirmation number and every response.

Do not treat a CFPB complaint as a substitute for a written debt dispute, a credit-report dispute, or an answer to a lawsuit.

FTC: report a scam or recurring fraud pattern

Use ReportFraud.ftc.gov if the caller appears to be impersonating a collector, demanding payment for a fake debt, threatening arrest, or using a scheme that could affect other consumers.

The FTC generally does not resolve individual disputes with a company. It uses reports to identify fraud and enforcement patterns. You can file an FTC report in addition to a CFPB complaint, not instead of one, when you want a company-specific response.

State attorney general and state regulators

Find your state attorney general through the National Association of Attorneys General directory. Your state may also direct debt-collection complaints to a department of banking, financial regulator, licensing agency, or consumer-protection office.

State law may cover conduct or businesses outside the FDCPA's federal scope. Use the same evidence file, but tailor the narrative to the agency's form. Include where you live, where the collector appears to be located, and where each contact occurred if the form requests it.

State agencies may investigate, seek a company response, refer the matter, or enforce state law. They do not represent you in court, and a filing does not guarantee a refund or damages.

Use a factual complaint narrative

Keep the complaint focused on events you can support. Identify the company, account, dates, statements, documents, and requested resolution.

Subject: Complaint about [collector name] and account [last four digits]

I am reporting collection conduct involving [company name]. The original creditor is [name], and the account is identified as [number or last four digits].

Timeline: On [date], [describe the event]. On [date], [describe the next event]. I sent a written dispute on [date], and delivery was confirmed on [date], if applicable.

Concern: I believe the company may have [describe the conduct]. The attached records include [call log, letter, voicemail, credit report, or other evidence].

Requested resolution: Please investigate the conduct, obtain the company's response, and ask it to [stop the improper contact, provide accurate account information, or correct information that cannot be verified].

I certify that the information above is accurate to the best of my knowledge.

[Name and contact information]

Quote key statements when you can. Separate what you directly observed from what another person told you. If you do not know a date, phone number, or representative name, say so rather than guessing.

Handle credit-report errors separately

A complaint alone is not a credit-reporting dispute. If the account appears inaccurately on your credit report, dispute the error with each credit-reporting company showing it and with the business that furnished the information.

Identify the exact account entry and the error: wrong balance, wrong consumer, duplicate account, inaccurate payment status, or an account that should not be reported. Include the relevant report page or screenshot and documents that support your position.

Keep copies of every dispute, delivery record, and response. If you also complain to the CFPB or a state agency, include the name of the credit-reporting company, the account, reporting dates, and the result of any separate dispute.

What filing a complaint can and cannot do

Each route has a different purpose:

A company might deny the complaint, explain its position, stop contacting you, update records, or offer another resolution. Save all of it. If new calls, letters, or documents appear after filing, send a concise follow-up that identifies what is new.

When legal help may be worth seeking

Consider a consumer-law attorney or legal-aid office promptly if the collector:

The FDCPA generally requires a private lawsuit to be filed within one year of the alleged violation. An agency complaint does not pause that deadline. A successful FDCPA claim can potentially include actual damages, additional damages of up to $1,000 per action, and attorney fees and costs where the law allows. Those outcomes are not automatic, and state-law deadlines may differ.

If the debt may be old, get individual advice before making a payment or making statements that could affect your position under state law.

Start with the documents you already have: save the validation notice, make a dated call log, and send a written dispute promptly if you are still within the 30-day validation period. Then submit the same clear timeline to the CFPB, FTC, or your state agency as appropriate.