What a mortgage lender wants in an explanation letter

A letter of explanation is a short document you send to your mortgage lender that describes something in your financial history they have flagged as a concern. It is not a confession or an apology — it is a factual account of what happened and why it does not reflect your ability to pay back a loan.

Lenders ask for these letters when they see a late payment, a gap in employment, a sudden drop in income, a collection account, a bankruptcy, or an unexplained deposit in your bank account. The letter gives you a chance to provide context the numbers alone do not show. A lender may deny your process without one, or may approve it with one.

The letter should be typed, one page or less, and addressed to the loan officer or underwriter by name if you have it. Keep the tone straightforward and honest. Do not make excuses or blame others. Do not write more than necessary.

Key Takeaways

  • Write the letter to address one specific issue the lender has flagged, such as a late payment or employment gap, with dates and a brief explanation of what caused it.
  • Include the month and year the issue occurred, what you did to resolve it, and evidence that the problem is behind you — such as proof of on-time payments since then or a new job offer letter.
  • Keep the letter to one page, use plain language, and avoid defensive language or lengthy backstory.
  • Send the letter to your loan officer or underwriter within the timeframe they request, usually within three to five business days of their request.

The structure of an explanation letter

Start with your name, loan number (if you have it), and the date at the top. Then address the letter to the loan officer or underwriter by name and title. If you do not have a name, "To the Underwriting Team" is acceptable.

The body of the letter should have three parts. First, state what the issue is — for example, "I had a 30-day late payment on my mortgage in March 2022." Second, explain briefly what caused it — "I was laid off in February and did not receive my severance until April." Third, describe what you did to fix it and why it will not happen again — "I found a new job in May and have made every payment on time since then."

Close with a straightforward statement: "I am committed to meeting my obligations on this loan" or "Thank you for considering my process." Sign your name by hand if you print it, or type your name if you send it electronically.

What to include as supporting documents

Do not attach a ten-page file folder. Attach only what directly proves your explanation. If you say you were laid off, include a copy of the severance letter or termination notice. If you say you found a new job, include the offer letter or a recent pay stub. If you say you have made payments on time since the late payment, ask your current lender for a payment history showing the last six to twelve months.

If the issue was a medical emergency, a hospital bill or explanation of benefits from your insurance company is useful. If it was a one-time large deposit that raised a red flag, include a bank statement with a note explaining where the money came from — an inheritance, a gift from family, a tax refund, or a bonus.

Do not include personal letters from friends or family vouching for your character. Lenders do not weight these, and they make the process look less professional.

Common issues that require explanation letters

A late payment is the most common reason lenders ask for a letter. If you were 30, 60, or 90 days late on a credit card, car loan, or previous mortgage, the lender will want to know why. The explanation should be specific: "I missed the payment in June because my hours were cut at work" is better than "I had financial trouble."

An employment gap — time when you were not working — also triggers a request. If you were unemployed for more than a month or two, explain what you were doing: looking for work, caring for a family member, returning to school, or recovering from an illness. Include the dates you were out of work and the date you returned.

A collection account or unpaid debt that went to a collection agency requires explanation. If you have since paid it, include proof of payment. If you are disputing it, include a copy of your dispute letter to the credit bureau. If you settled it for less than the full amount, include the settlement agreement.

A bankruptcy in your history will definitely prompt a request. Explain what led to it, how long ago it was, and what has changed since then. Lenders often approve mortgages to people with old bankrupties if they have a clean payment record afterward.

Tone and language to use

Write in the first person: "I had a late payment" rather than "There was a late payment." Take responsibility for the situation, even if external circumstances caused it. "I was not prepared for the medical bills" is better than "The hospital charged too much."

Avoid emotional language or lengthy backstory. Do not write "I was devastated when I lost my job" or "My family suffered greatly." Lenders are not moved by emotion; they want facts. A sentence or two of context is enough.

Do not blame others. "My ex-spouse was supposed to pay that bill" or "My employer treated me unfairly" shifts focus away from your responsibility. If someone else was involved, mention it only if it is directly relevant: "My spouse's job loss reduced our household income by 40 percent in January."

Do not use phrases like "I promise" or "I swear." A straightforward statement of fact is more credible: "I have made every payment on time since June 2022" is stronger than "I promise I will never be late again."

How to send the letter and what happens next

Ask your loan officer how they want to receive it — by email, fax, or mail. Email is fastest. If you email it, send it as a PDF so the formatting does not change. Include a brief note in the email: "Please find attached my letter of explanation regarding the late payment in March 2022."

Send it within the timeframe the lender requests, usually three to five business days. If they do not specify, send it within a week of their request. Delays can slow down your process.

After you send it, the underwriter will review your letter and supporting documents alongside your credit report, income verification, and other process materials. They may ask follow-up questions, or they may move forward with approval. Some lenders approve conditional on the explanation; others use it as one factor among many.

You will not hear back when ready. Underwriting typically takes five to ten business days. If you do not hear back within two weeks, contact your loan officer to confirm they received the letter.

What not to do in an explanation letter

Do not write more than one page. Lenders receive hundreds of applications; a three-page letter will not be read in full. If you need more space, you have included too much detail.

Do not attach documents unrelated to the issue — tax returns, pay stubs from years ago, or character references. Stick to what proves your explanation.

Do not handwrite the letter unless the lender specifically asks you to. Typed letters look more professional and are easier to scan into their system.

Do not send the letter without a copy of your ID or signature. If you email it, type your name at the bottom. If you print and mail it, sign it by hand.

Do not wait for the lender to ask a second time. If they request a letter and you do not send one, they may deny your process or put it on hold indefinitely.

Frequently Asked Questions

What if I have more than one issue the lender is asking about?

Write one letter that addresses all of them in separate paragraphs. Do not send multiple letters. For example, paragraph one covers the late payment, paragraph two covers the employment gap, and paragraph three covers the collection account. Keep the total length to one page by being concise on each point.

Do I need to explain every late payment on my credit report?

No. The lender will ask for explanations on the ones that concern them most — usually recent late payments or ones that are part of a pattern. If they do not ask, do not volunteer explanations for older or minor issues. Stick to what they flagged.

What if the issue was my spouse's fault, not mine?

If you are explore jointly, the lender sees both of your credit reports and both of you are responsible for the debt. Explain the situation factually without blame: "My spouse handled that account and missed a payment in April. We have since set up automatic payments to prevent this from happening again." Focus on what you have done to fix it.

Can I type the letter in an email instead of sending it as a separate document?

Yes, if the lender says that is acceptable. Ask first. Some lenders prefer a formal letter document; others are fine with an email. Either way, keep it to one page and maintain a professional tone.

How far back do I need to explain late payments?

Lenders typically focus on late payments from the last two to three years. Anything older than seven years will not appear on your credit report anyway. If the lender asks about something from five years ago, explain it, but do not volunteer explanations for very old issues.