Your Mortgage Servicer Made a Mistake. Here Is the Written Notice That Starts a Federal Deadline
A phone call may not be enough. Under Regulation X, a written notice of error sent to the right address requires your servicer to acknowledge it within five business days and fix or explain most errors within 30 business days.
By Anthony Brikho · 5 min read
WASHINGTON, Nov. 12, 2026 — A misapplied payment, a late fee you did not owe, an escrow charge that does not match your tax bill or a payoff figure that is simply wrong: mortgage servicing mistakes happen, and they can follow a borrower onto a credit report or into a closing that falls apart. A phone call is often the fastest first step, but federal mortgage servicing rules give the strongest protection to a borrower who puts the complaint in writing.
Those rules are in Regulation X, which implements the Real Estate Settlement Procedures Act. Two sections matter most: 12 CFR 1024.35, which covers a written "notice of error," and 12 CFR 1024.36, which covers a written "request for information." Neither is new. Both have applied to most mortgage servicers for years, and this guide explains how they work rather than reporting a rule change.
What counts as a covered error
Section 1024.35 lists specific error types a servicer must investigate. They include failing to accept a payment that meets the servicer's stated requirements, failing to credit a payment as of the date it was received, failing to pay taxes or insurance from escrow on time, charging a fee the servicer lacks a reasonable basis to impose, failing to provide an accurate payoff balance when asked, and failing to give accurate information about loss mitigation options or foreclosure. The rule also includes a catch-all for "any other error relating to the servicing of a borrower's mortgage loan."
A notice does not need special legal wording. It needs your name, information that lets the servicer identify the account, usually the loan number, and a description of the error you believe occurred. Being specific helps: give the payment date, the amount, the confirmation number and what the statement shows instead.
Send it to the right address
This is the step borrowers most often miss. The rule allows a servicer to designate a specific address for notices of error. If it does, it must tell borrowers, and a letter mailed to the payment lockbox or a general correspondence address may not trigger the legal deadlines. Look for the designated address on your periodic statement, on the servicer's website or in a written notice from the servicer. Keep a copy of everything you send and use a mailing method that proves delivery.
The clock the servicer must follow
| Step | Deadline | Rule |
|---|---|---|
| Written acknowledgment of a notice of error | Within 5 business days of receipt | 12 CFR 1024.35(d) |
| Payoff-balance error | Within 7 business days | 12 CFR 1024.35(e)(3) |
| Most other errors | Within 30 business days; one 15-business-day extension allowed with notice | 12 CFR 1024.35(e)(3) |
| Acknowledgment of a request for information | Within 5 business days | 12 CFR 1024.36(c) |
| Request for the identity of the loan owner | Within 10 business days | 12 CFR 1024.36(d)(2) |
| Most other information requests | Within 30 business days; one 15-business-day extension allowed with notice | 12 CFR 1024.36(d)(2) |
The rule sets separate timing for certain errors tied to a scheduled foreclosure sale, and some deadlines do not apply in limited situations. Read the rule text or ask the servicer to explain which timeline applies to your notice.
Within the deadline, the servicer must do one of two things. It can correct the error and tell you in writing what it corrected and when it took effect. Or it can conduct a reasonable investigation and explain in writing why it believes no error occurred, the basis for that conclusion and that you may request the documents it relied on. A servicer generally cannot charge a fee or require a payment as a condition of responding.
Credit reporting protection
For a notice alleging a payment-related error, the rule says the servicer may not furnish adverse information about any payment that is the subject of the notice to a consumer reporting agency for 60 days after receiving it. That protection is narrower than it sounds. It covers the disputed payment, not the whole account, and it does not erase a late payment that was in fact late. If you keep paying, make the payment you agree you owe so you do not create a new delinquency while the dispute is open.
When you need records first
Sometimes you are not yet sure an error happened. A written request for information under Section 1024.36 can get you the payment history, escrow records or the name and contact information of the company that owns the loan. A servicer may decline requests it considers overbroad, duplicative or about confidential information, but it must say so in writing. Ask for a specific period and specific records.
A practical checklist
- Find the servicer's designated address for notices of error and requests for information.
- Write one clear letter per problem with your name, loan number, the dates and amounts involved and what you believe is wrong.
- Attach copies, never originals, of bank statements, receipts or tax bills that support your account.
- Send it in a trackable way and calendar the 5-, 7- and 30-business-day marks.
- Keep making undisputed payments on time.
- If the response is incomplete or missing, you can submit a complaint to the CFPB and consider talking with a HUD-approved housing counselor or an attorney.
What this does not do
A notice of error is not a loan modification request, and it does not pause a payment that is due. Some servicers, such as small servicers and certain other entities, are exempt from parts of these rules, and state law may add protections. The value of the process is a documented, deadline-driven answer from the company that handles your money. For a borrower trying to close a sale, refinance or stop a fee from snowballing, that paper trail is often what gets a mistake fixed.
This article is general information, not legal advice. Sources: Consumer Financial Protection Bureau, Regulation X, 12 CFR 1024.35 and 1024.36.
Entrance to the Consumer Financial Protection Bureau headquarters in Washington, D.C., photographed Feb. 10, 2025. Photo: G. Edward Johnson via Wikimedia Commons, CC BY 4.0.