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Mortgage prep

Letter of Explanation for a Mortgage

Underwriters do not ask for letters of explanation at random. Eight standard conditions generate almost all of them, and each one needs a different set of facts. This page maps the condition wording to what the letter has to contain and what has to travel with it.

See the Loan Prep Letter KitJump to the free generator

Why underwriting asks

A mortgage letter of explanation is a signed statement an underwriter requires when the file contains something the documents alone do not settle — a deposit with no visible source, a gap in employment, a recent credit inquiry, an address that does not reconcile — and the loan cannot be cleared to close until it is answered.

It is issued as a condition, which means it has a place in a checklist and a person whose job is to close it. That is why the mechanics matter as much as the content: a letter that a processor cannot match to the open condition does not clear it, however well written it is.

Working generator

Write the letter for one condition

Choose the condition type, fill in the facts, and the generator writes the letter and the covering email that names the condition identifier. Run it once per condition rather than trying to cover several at a time.

Runs entirely in this browser tab.

Everything you type stays on this device. ApprovalPrep does not send, store, or receive the names, dates, addresses, or amounts you enter here — the page holds the templates and does the substitution locally.

Step 1

Fill in the facts you can verify.

Leave a box empty and the draft keeps a visible [placeholder] there, so nothing gets sent with a blank you did not notice.

Static templates and local text substitution only. This is not AI, legal advice, financial advice, credit repair, or a promise of approval. Use only facts you can support with real documents.

Step 2

Copy your draft.

One condition, answered and closed. The condition identifier appears in the reference line so a processor can route it without opening the attachments.

Fill in the form and choose Build my draft. Your finished text appears here, ready to copy.

Next step

Loan Prep Letter Kit

The generator above is free and always will be. The paid kit is a direct download: a PDF guide plus editable DOCX versions of this document and the related letters, so you can keep and re-edit them outside the browser.

Key facts

Know the boundary before drafting.

  • Conditions are tracked individually. Each one has an identifier in the lender's system and is cleared on its own, which is why one letter per condition moves faster than one letter covering four.
  • A large deposit condition is about the source of the funds, not the amount. Underwriters need to see the money leave an identifiable place and arrive, which usually means a statement from both sides.
  • A credit inquiry condition is asking whether new debt was opened. The answer that clears it is a direct statement that no new account resulted, and it has to be true on the day you sign.
  • Gift funds are a separate document. A gift letter has its own required elements — donor, relationship, amount, and a statement that no repayment is expected — and a letter of explanation is not a substitute for one.
  • Anything you volunteer becomes a condition. Underwriters document what they learn, so a sentence explaining an unrelated issue creates a new item on the checklist rather than goodwill.

Fields to collect

Build the factual record.

  • The condition identifier and its wording, exactly as the lender issued it
  • The loan number and the processor or underwriter's name
  • The account, employer, address, or date the condition names
  • The dates the event began and ended
  • The source of any funds involved, and the name of the party they came from
  • Whether any new debt resulted, stated directly
  • The current position as of the day you sign
  • The statements, letters, or records that reconcile against each figure in the letter

Exact sequence

Prepare it step by step.

  1. 1. Get the condition list from your loan officer in writing. Verbal relays lose the condition identifier, and the identifier is what routes your letter.
  2. 2. Sort the conditions into one letter each, and note which documents each will need before writing anything.
  3. 3. For any funds condition, obtain the record from both sides of the transfer. A statement showing money arriving, with nothing showing it leaving somewhere identifiable, does not close a source-of-funds question.
  4. 4. Write each letter to its condition, quoting the wording, and stop at the point the condition is answered.
  5. 5. Reconcile every figure against the attached statements before you send. A rounded number in the letter against an exact one on the statement causes a second request.
  6. 6. Send them together with one covering email that lists the condition identifiers, and ask the processor to confirm which ones are cleared.

Decision table

The eight conditions that generate almost every mortgage letter of explanation

Match the wording your lender sent to the row below. The third column is what actually clears it; the fourth is what people send instead and why it does not.

Condition wording you were sentWhat the underwriter is really askingWhat clears itWhat fails
Explain the deposit of $[amount] on [date]Where did this money come from, and is it borrowedA statement from the sending account plus the receiving statement, and the sender's own confirmationThe receiving statement alone — it shows arrival, not source
Explain all credit inquiries within the last 120 daysDid you open new debt that is not on the applicationA line-by-line list of the inquiries with a direct statement that no new account resultedA general statement about shopping around, with no inquiry list
Explain the late payment(s) on [account] in [month]Is this a pattern or an event, and is it overThe cause, the date it was cured, and a current statement showing the account in good standingAn apology with no cure date and no current statement
Explain the gap in employment from [date] to [date]Was there income during the gap, and is the current job stableThe dates, what happened, how the gap was covered, and the current employer's start date and statusA narrative about the industry, with no dates and no current-status confirmation
Explain the address history discrepancyAre you the same person as the credit file, and where were you livingThe actual dates at each address and a document tying you to each — a lease, a utility bill, a licenceA statement of the correct address with nothing tying you to the dates
Explain the name variation on [document]Is this the same personThe legal basis for the variation and a document showing both forms — marriage certificate, court order, licenceA statement that both names are yours
Explain the NSF or overdraft items in [month]Is the account managed, and is the reserve realThe cause, whether it recurred, and statements for the following months showing it did notAn explanation of the single month, with no following months shown
Provide a letter of explanation for the gift fundsIs this a gift or an undisclosed loanA gift letter with donor, relationship, amount, and a no-repayment statement — plus the transfer recordA letter of explanation used in place of a gift letter; they are different documents

Copyable template

Employment gap condition

[Date]

[Processor name], [lender]
Re: Loan [number] — Condition [ref] — Employment gap

This letter answers Condition [ref]:

  "[paste the condition wording]"

I was employed by [previous employer] as [title] until [end date]. I began at [current employer] as [title] on [start date]. The gap between those dates was [length].

Reason for the gap: [plain reason — role eliminated, relocation, caring responsibility, returned to study].

How the period was covered: [severance / savings / partner's income / unemployment benefit], in the approximate amount of $[amount] over the period.

Current position: I have been employed at [current employer] since [start date] in a [full-time / part-time] permanent position at $[amount] per year. My employer's verification is attached.

Attached: 1. Employment verification from [current employer] dated [date]. 2. Separation letter from [previous employer] dated [date]. 3. Bank statements for [months] showing the period was covered.

Signed ______________________  Date ____________
[Your full legal name] — Loan [number]

Second tool

Address history condition

[Date]

[Processor name], [lender]
Re: Loan [number] — Condition [ref] — Address history

This letter answers Condition [ref]:

  "[paste the condition wording]"

My address history for the period under review is:

  [start date] to [end date] — [full address] — [owned / rented / lived with family]
  [start date] to [end date] — [full address] — [owned / rented / lived with family]

The discrepancy on my credit file arises because [reason — mail forwarding, a lease in another party's name, a period living with family with no utility in my name].

Attached, tying me to each address for the dates stated:

  1. [Lease / deed] for [address], dated [date]
  2. [Utility bill / bank statement] for [address], dated [date]
  3. [Driver's licence / voter record] showing [address]

Signed ______________________  Date ____________
[Your full legal name] — Loan [number]

Avoid

Common mistakes

  • Sending one letter for four conditions. Each has an identifier and clears separately, so a combined letter leaves all four open until a processor separates them.
  • Answering a source-of-funds condition with only the receiving statement. It shows the money arrived; the underwriter is asking where it came from and whether it is borrowed.
  • Rounding an amount. A letter saying $8,400 against a statement showing $8,412.63 produces a second request rather than a cleared condition.
  • Using a letter of explanation where a gift letter is required. They are different documents with different required elements, and the substitution is caught every time.
  • Explaining an issue the underwriter did not raise. It becomes a documented condition on the file, which is the opposite of what volunteering it was meant to achieve.
Self-service boundary

ApprovalPrep is not a lender, broker, or mortgage adviser. It does not contact your lender, clear conditions, decide what your statements show, or influence an underwriting decision. The generator assembles your own words in your browser. You send your own letters.

Primary sources

Check the current instructions.

Fannie Mae — Selling Guide

Open official or primary source →

Freddie Mac — Single-Family Seller/Servicer Guide

Open official or primary source →

Internal Revenue Service — Frequently Asked Questions on Gift Taxes

Open official or primary source →

Questions

Before you buy

Why does a mortgage underwriter want a letter of explanation?

Because the file contains something the documents alone do not settle — a deposit with no visible source, an employment gap, a recent credit inquiry, an address that does not reconcile. It is issued as a condition, which means the loan cannot be cleared to close until it is answered.

What are the most common mortgage letter of explanation requests?

Eight cover almost all of them: a large deposit, credit inquiries within the last 120 days, late payments, an employment gap, an address history discrepancy, a name variation, NSF or overdraft activity, and gift funds.

How do I explain a large deposit to an underwriter?

Show both sides of the transfer. Name the sender and your relationship to them, attach the statement from the sending account and the receiving statement, and state directly that the funds are not borrowed and no repayment is owed.

Do I need one letter or several?

One per condition. Conditions are tracked and cleared individually, so a single letter covering several of them stays open on all of them until someone unpicks it. Send them together with one covering email listing the identifiers.

Is a letter of explanation the same as a gift letter?

No. A gift letter has specific required elements — the donor, the relationship, the amount, and an express statement that no repayment is expected — and lenders will not accept a general explanation in its place.

Will a letter of explanation get my mortgage approved?

No. It clears one condition. The credit decision rests on income, assets, the debt-to-income calculation, the appraisal, and the lender's own overlays, none of which any letter can change.

Next step

Keep the editable version: Loan Prep Letter Kit.

You need to explain documents before a loan or financing review.

Everything on this page is free to use and copy. The kit is the paid, downloadable version at $99, paid once: a PDF guide plus editable DOCX files you keep, covering 8 named documents including auto loan explanation letter, mortgage explanation letter, personal loan explanation letter.

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No fake documents, no credit repair, no legal or financial advice, no third-party contact, and no approval promise.

Data boundary:

ApprovalPrep does not store customer letter answers, completed drafts, uploaded documents, or personal application packets.