You can dispute a credit report item online, by mail, or by phone, and Equifax, Experian, and TransUnion all accept all three. The law gives you the same investigation rights no matter which door you use. What changes is practical: how fast the dispute lands, how many documents you can include, and what proof you are left holding afterward. Online is fastest to submit. Mail is slower but lets you send exactly the letter and copies you choose, and leaves you with a paper file. Phone is quick but leaves you with the least.
Short answer
Online, mail, or phone: what each gives you
The CFPB confirms that the nationwide credit reporting companies can be contacted online, by mail, or by phone, and the FTC notes that however you file, the bureau has 30 days to investigate. Here is how the three channels differ in practice.
| Online | Phone | ||
|---|---|---|---|
| Speed | Received the moment you submit | Adds postal transit days before the bureau receives it | Received during the call |
| What you can attach | Uploads, within each bureau’s limits (TransUnion: up to 5 files, 5 MB total) | Copies of any documents you choose to enclose | Nothing during the call itself |
| Record you keep | A confirmation number and your account’s dispute history | Your copy of the letter and enclosures, plus a mailing receipt if you buy one | Whatever notes you take; the bureau records the summary |
| Text limits | Whatever the form allows; many flows start from preset reasons | None beyond what you write; shorter and specific reads better | What the representative types in |
| Cost | Free | Free to dispute; you pay postage and any extra services | Free |
Two details from the bureaus themselves are worth knowing. TransUnion’s dispute FAQ says it does not accept online uploads for public-record disputes or for changes to your Social Security number, date of birth, name, or address; those need phone or mail. And Equifax says that if you dispute by mail, the results come back by U.S. mail, while online disputes get results by email.
Where to mail a credit bureau dispute
These are the dispute addresses each bureau shows on its own site, checked on September 22, 2026. Government pages and third-party lists sometimes show a different ZIP code (the FTC’s page lists 30348 for Equifax and 19016 without the +4 for TransUnion), so use the bureau’s own page or the address printed on your credit report.
- Equifax: Equifax Information Services LLC, P.O. Box 740256, Atlanta, GA 30374-0256. Source: Equifax (it also publishes a mail-in dispute form).
- Experian: Experian, P.O. Box 4500, Allen, TX 75013. Source: Experian. Experian says to send copies, not originals, because it cannot return them.
- TransUnion: TransUnion Consumer Solutions, P.O. Box 2000, Chester, PA 19016-2000. Source: TransUnion. TransUnion states it accepts either standard or certified mail.
Addresses change. Open the bureau’s page the day you mail, and if the address on your credit report differs, the FTC says you can use the one on your report.
What to put in the envelope
The FTC and CFPB list nearly the same contents. Combining their guidance, a mailed dispute should include:
- Your full name, current address, and phone number.
- The report or confirmation number from your credit report, if you have one.
- Each item you are disputing, with the account name and number, and a clear explanation of why it is wrong.
- A specific request: correct the item, or remove it.
- A copy of the relevant page of your credit report with the disputed items circled or highlighted.
- Copies, never originals, of documents that support you: statements, payment records, letters from the creditor.
- The bureau’s dispute form, if it has one.
The FTC publishes a sample letter to the credit bureaus you can adapt, and the CFPB’s checklist covers the same ground. Before you seal it, make a copy of everything inside. Both agencies tell you to keep copies of what you send. Identity documents such as a driver’s license or utility bill help the bureau match you to your file; Equifax lists examples on its dispute page.
For the full step-by-step on finding and wording errors, see how to dispute errors on your credit report. If you have seen “609 letters” promoted online, read whether a 609 dispute letter works before you copy a template.
First Class, certified, or a PDF you print
Once you choose mail, the next choice is how much proof you want from the Postal Service.
- Plain First Class with a stamp or meter strip. This is ordinary letter mail. It costs the least, but on its own gives you no receipt and no delivery record. Whether the envelope carries a postage stamp or a printed meter strip does not change the service; it is the same First Class letter.
- Certificate of Mailing. A low-cost add-on that, per USPS, proves you presented the piece for mailing on a given date. It does not prove delivery.
- Certified Mail, with or without Return Receipt. Certified Mail gives you a postmarked receipt and a tracking number, and USPS keeps a delivery record. Adding Return Receipt gets you evidence of who signed and when. The FTC suggests certified mail with return receipt requested so you can document that the bureau got your letter; the CFPB says you can choose to send it that way. It is a recommendation, not a requirement, and TransUnion says it accepts standard mail too.
Dispute apps split roughly two ways. Some file with the bureaus electronically on your behalf, which works like an online dispute. Others generate a PDF letter that you print, sign, and mail yourself, which means you still pick the postage and pay for it. 850ai is a third pattern: it prints each letter and mails it USPS First Class with a postage stamp, and nothing goes out until you click send or Deploy. If you want a delivery signature, certified mail is the service that provides one.
A stamped letter is ordinary mail that a person at the bureau has to open, and it leaves you with a paper record of what you sent. That is the honest case for mail. Nobody can show that the envelope itself makes a correction more likely, and you should be skeptical of anyone who says a bureau “takes mail more seriously.”
What happens after you send it
Under the Fair Credit Reporting Act, the bureau generally has 30 days from when it receives your dispute to investigate. The CFPB explains two cases where it can take up to 45 days: if you dispute after getting your free annual credit report, or if you send relevant additional information during the 30-day window. The statute is 15 U.S.C. § 1681i. Because the clock starts on receipt, a mailed dispute starts later than an online one by however long the mail takes, which is one more reason to keep your mailing date on record. You can estimate your dates with the dispute deadline calculator.
During the investigation, the bureau forwards your dispute and the evidence you sent to the company that reported the item. Once it finishes, it has five business days to tell you the result in writing, and if anything changed you get a free copy of your report that does not count against your annual free report. A bureau can also decide a dispute is frivolous, for example if it does not say what is being disputed, but it must notify you and explain why.
If the result does not fix the problem, your options are:
- Dispute with the company that reported it. The furnisher has its own duty to investigate; the FTC has a sample letter for that too.
- Dispute again with new evidence. Experian notes that disputes with additional relevant information can be submitted online or by mail.
- Add a statement of dispute to your file so future readers see your side.
- File a CFPB complaint. The CFPB sends your complaint to the company for a response. Here is how to file a CFPB complaint.
If you would rather not print, address, and track letters to three bureaus yourself, 850ai reads your Equifax, Experian, and TransUnion reports, drafts an account-specific letter for each item, mails it after you click send, tracks the dispute cycle, and can escalate to the creditor and to a CFPB complaint. Plans are DIY at $29.99/mo, Auto at $99.99/mo, and AutoMax at $199.99/mo on the pricing page; there is no free plan. To compare it with other apps, see our roundup of the best AI credit repair tools. No tool can guarantee a deletion, and you can always dispute for free directly with the bureaus using the addresses above.