How to dispute a credit report error by certified mail, with AI

If your credit report shows an account that isn't yours, a late payment you never made, or a balance that's wrong, the law lets you dispute it with the credit bureau for free. Sending the dispute by certified mail with a return receipt gives you proof of exactly when the bureau received it.

With Mailsnail connected to your AI assistant, you can draft the letter and mail it in one conversation, without a printer or a trip to the post office.

Connect once

Add this URL to Claude, ChatGPT, Cursor or any app that supports MCP connectors, then sign in:

https://api.mailsnail.dev/mcp

Step-by-step instructions for each app are on the setup page.

Find what's wrong first

Get your reports from all three bureaus (free weekly at AnnualCreditReport.com). For each mistake, write down:

• the creditor or collector's name, exactly as the report shows it
• the account number as shown, often partly masked
• what's wrong and what it should say

Draft it with the assistant

Give it the facts plainly. For example:

My Experian report shows a collection from Midland Credit for $612, account ending 4471. That debt isn't mine; I've never had an account with the original creditor. Draft a dispute letter to Experian asking them to investigate and delete it. Include my full name, current address, date of birth and the last four digits of my Social Security number. Then send it by certified mail with an electronic return receipt. Show me the proof first.

A good dispute letter is short and specific: who you are, which item is wrong, why, and what you want done (deleted or corrected). One letter can list several errors on the same report.

The bureaus publish their dispute mailing addresses on their websites. Ask the assistant to use the current dispute address for each bureau, and check it on the proof before you approve.

What happens next

1. verify_address checks that the bureau's address is deliverable. Free.
2. preview_letter renders the letter and returns a proof PDF and the exact price. Nothing is charged.
3. You read the proof. Check your name, address, the account details and that nothing private is there that you didn't mean to include.
4. send_letter mails it by certified mail with the return receipt you chose and gives you a receipt token.

If you have supporting documents, such as a payment confirmation or an identity theft report, combine them with the letter into one PDF and give the assistant a link to it. Keep the whole package to five pages or fewer.

Pick your proof

Service	What you get	From a balance	One letter by card
Certified	USPS tracking and proof of mailing	$8.61	$8.83
Certified + electronic return receipt	The recipient's signature as a PDF	$11.64	$11.83
Certified + green card	The signed card mailed back to you	$14.27	$14.42

One page, black and white. Extra pages are priced at our cost and the preview always shows the exact figure.

Keep the record

Save the receipt token. Later, ask the assistant "has Experian received my dispute?" and get_letter returns the USPS tracking number, the latest scan and, for an electronic return receipt, a link to the signature PDF. The delivery date is when the bureau's investigation clock starts.

If the bureau doesn't fix the error, you can send a follow-up, dispute directly with the company that reported it, or file a complaint with the Consumer Financial Protection Bureau.

What Mailsnail doesn't do

We print and mail exactly what you approve. We aren't a credit repair company, we don't contact the bureaus for you, and we don't give legal advice.

Related guides

• How to send a debt validation letter
• How to send a demand letter by certified mail
• How to send certified mail with a return receipt from an AI agent

claude mcp add -t http mailsnail https://api.mailsnail.dev/mcp

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