To write a dispute letter to your mortgage company that carries real legal weight, send a written notice of error or request for information under the Real Estate Settlement Procedures Act: identify yourself and your loan, describe the specific problem or the records you need, and mail it by certified mail to the servicer’s designated address for disputes. Done correctly, your letter triggers a federal five-business-day acknowledgment deadline and a 30-business-day response deadline. Done incorrectly — wrong address, vague claim, no proof of delivery — the servicer has no legal obligation to respond at all.
Decide Which Kind of Letter You’re Writing
Federal regulations split mortgage disputes into two categories, and the servicer handles each under different rules. Picking the right one before you start writing matters.
A notice of error tells your servicer that something on your account is wrong and asks them to fix it. Covered errors include misapplied payments, failures to pay property taxes or insurance from escrow, unauthorized fees, inaccurate payoff balances, inaccurate loss mitigation information, mistakes made when your loan was transferred to a new servicer, and improper foreclosure actions. The regulation also includes a catch-all for any other error related to servicing your loan, so you are not limited to that list.
A request for information asks the servicer to produce specific records or data about your loan. Common examples include the identity of the investor who owns the loan, a complete payment history going back to origination, an escrow account analysis, or a current payoff statement. You’re not claiming anything is wrong; you need information the servicer is required to provide.
Both types of letter fall under Regulation X, which implements RESPA. The format and delivery rules overlap, but the content differs: an error notice makes a factual claim and asks for a remedy, while an information request names records.
Gather Your Account Information First
Every letter needs your mortgage loan account number from your monthly billing statement and the full legal names of all borrowers on the note. If your loan was recently transferred between servicers, include the previous servicer’s name and any prior loan number. Servicers handle thousands of accounts, and missing identifiers are the most common reason letters get kicked back as unprocessable.
For a notice of error, pull the specific dates and dollar amounts behind your claim. If you’re disputing a payment that wasn’t credited, find the date you sent it, the amount, and the date it cleared your bank. Check the transaction history on your billing statement or your servicer’s online portal. These figures narrow the investigation window and make it harder for the servicer to say it couldn’t locate the issue.
For a request for information, you don’t need supporting evidence, but you do need to describe what you’re asking for with enough specificity that the servicer knows exactly which records to pull.
Write the Letter
Your letter qualifies for RESPA protection as long as it’s in writing, identifies you and your loan account, and either describes the error or specifies the information you need. A well-structured letter still gets better results than a vague complaint.
Open with a clear subject line: “Notice of Error — Account #[your number]” or “Request for Information — Account #[your number].” This tells the servicer’s intake staff which regulatory track to route your letter through. Below that, put the date, your name and mailing address, the servicer’s name, and the designated dispute address.
State the specific error or information request in the first paragraph. Don’t bury your point under background narrative. A sentence like “My January 2026 payment of $1,847 was received on January 3 but was not credited to my account until February 1, resulting in a $73.50 late fee” gives the servicer everything it needs to begin investigating. For an information request, “I am requesting a complete payment history for this account from origination through the present date” is direct enough to avoid ambiguity.
If you’re asserting an error, say what you want the servicer to do about it: reverse the late fee, correct the posting date, refund an escrow overage. The CFPB publishes sample letters for both error disputes and information requests that you can download and adapt.
What to Attach
For a notice of error, attach copies of anything that supports your claim. Canceled checks, bank statements showing the cleared payment, screenshots of online payment confirmations, and any prior correspondence with the servicer all strengthen your position. The Federal Trade Commission recommends gathering these records before sending your letter so the servicer can cross-reference your claim against its own records.
Never send originals. Photocopy or scan everything and keep the originals in a dedicated file. If the dispute escalates to a regulatory complaint or lawsuit, those originals become your evidence. For an information request, you generally won’t need attachments because you’re asking the servicer to produce records, not proving a factual claim.
Find the Correct Address
This is where many borrowers quietly lose their RESPA protections. Mortgage servicers are allowed to designate a specific address for receiving error notices and information requests, and that address is almost never the same as the payment processing center. If you send your letter to the payment address, the servicer can argue the regulatory clock never started.
Federal regulations require a servicer to post the designated dispute address on its website if the website lists any contact address at all. Check the “Contact Us” or “Help” page and look for language about disputes, complaints, or qualified written requests. The back of your monthly billing statement often lists this address separately from the payment address, sometimes in fine print.
If you can’t find it, call the servicer and ask for it specifically. Document the date of your call, the representative’s name, and the address they provide. Then verify it against whatever you can find online before you mail anything.
How to Send It
Use USPS Certified Mail with Return Receipt Requested. The green card that comes back with the recipient’s signature is your proof of delivery and the date the regulatory clock starts. Without it, the servicer can claim it never received your letter and you’ll have no way to prove otherwise.
Keep the tracking number and the return receipt card together with your copy of the letter and all attachments. That packet is your evidence file. If you later need to file a complaint with the CFPB or pursue legal action, everything is in one place.
Some servicers accept disputes through online portals or by email, but the regulations are written around written notice sent to a designated address. Portal submissions don’t always generate the kind of timestamped confirmation you’d need to prove delivery. Certified mail remains the safest approach when you want ironclad proof the servicer received your letter on a specific date.
What the Servicer Has to Do, and When
Once your letter arrives at the correct address, two federal clocks start. The timelines are the same for error notices and information requests.
Within five business days, the servicer must send you a written acknowledgment. Business days exclude weekends and federal holidays. The acknowledgment doesn’t need to resolve anything; it just confirms receipt.
Within 30 business days of receipt, the servicer has to either resolve the error or provide the requested information. It can extend the deadline by 15 business days, but only if it notifies you in writing before the original window closes and explains why.
When the servicer responds to a notice of error, it must do one of two things: correct the error and tell you what was fixed and when, or explain in writing why it determined no error occurred, including the reasons and your right to request the documents it relied on.
Credit Reporting Protection
For 60 days after receiving your notice of error, the servicer is prohibited from reporting negative information about the disputed payment to any credit bureau. This matters if you’re disputing a payment the servicer says was late. Without this protection, a servicer could damage your credit score while still investigating whether you’re right.
Foreclosure Keeps Moving
A pending notice of error does not, by itself, stop foreclosure. The regulation permits servicers to continue foreclosure and other legal remedies while investigating most types of errors. A narrow exception applies when you’re asserting that the servicer initiated foreclosure in violation of loss mitigation protections. If you’re facing a scheduled foreclosure sale, separate loss mitigation rules may apply alongside the error resolution process.
If the Servicer Doesn’t Respond
If the servicer misses a deadline, or sends a response that doesn’t actually address your dispute, you have escalation options.
Filing a complaint with the CFPB is the fastest way to get attention. The bureau forwards complaints to the servicer and tracks whether it responds, and servicers take CFPB complaints seriously because regulators monitor the data. You can file online at consumerfinance.gov.
If the servicer’s failure caused you actual financial harm, federal law lets you sue. A servicer that violates RESPA’s servicing requirements is liable for your actual damages. If you can show a pattern or practice of noncompliance rather than an isolated mistake, the court can award additional statutory damages of up to $2,000. A winning borrower is also entitled to attorney’s fees. You have three years from the date of the violation to file suit.
Your certified mail receipt, the copy of your letter, and the servicer’s response (or silence) form the core of your evidence. This is why the paper trail matters from the start. A phone call might resolve the problem faster on a good day, but it gives you nothing to work with when things go sideways.