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The Hidden Truth Behind U.S. Mortgage Underwriting: Why Do Approvals Get Delayed? [Mortgage Guide Ep. 4]

01/15/26
in Mortgage Guide

📝 Who Works in the Underwriting Stage?

  • Processor (Processor): they organize your documents, verify the completeness of items, and pass everything to the underwriter.
  • DU/LPA(Automated Underwriting System): AI algorithms developed by the two major housing agencies (Fannie Mae and Freddie Mac). Your loan must receive initial eligibility approval here.
  • Underwriter: The final judge. They verify that the automated results match your actual documents (income, assets, etc.) and issue the final approval.

You’ve submitted all your documents, the appraisal is finished, but it’s been days with no update from the lender. Feeling anxious, wondering “Did something go wrong with my loan?”

You’re now in Underwriting, the core of the mortgage process. This is where your file is checked to make sure it meets both U.S. financial regulations and the lender’s internal guidelines. Today, we’ll walk you through the must-avoid behaviors to ensure your file passes smoothly.

U.S. mortgage underwriting



1. Who Actually Reviews My Documents in Underwriting?

Both people and automated systems work together.

✅ Review System in Underwriting

ReviewerDetails
ProcessorOrganizes (scrubs) documents and checks for missing items before sending to the underwriter.
DU/LPA Automated underwriting systems by Fannie Mae and Freddie Mac; provides the first-level eligibility approval.
UnderwriterThe final decision-maker who verifies all documents and issues final approval.




2. Underwriting Criteria & the Three Major No-Go Behaviors

Once the processor’s document package reaches the underwriter, the true Underwriting begins. Four major areas are examined simultaneously:

✓ Borrower: income, employment, credit score, debt levels, occupancy type (primary/investment)
✓ Property: appraised value, condition, property type (single-family, condo, townhouse), HOA risk
✓ Loan Program: fixed/ARM, LTV, DTI standards, program-specific rules
✓ Compliance: TRID, disclosure timing, documentation format, required disclosures issued correctly

✅ Types of Underwriting Outcomes

OutcomeDescription
ApprovedVery few or no conditions; requirements already satisfied.
Approved with ConditionsAdditional documents or explanations are needed, but approval is achievable once all are met.
SuspendedKey information missing, making decision difficult.
DeclinedCannot be approved under current structure (may need different program or loan structure).

✅ List of Don’ts During Underwriting

Don’tsWhy
Making Large DepositsAny unusually large deposit outside regular income raises suspicion of borrowed funds or even money laundering and may require prove the source.
Taking on New DebtOpening new credit or getting a car loan changes your DTI and can cause your loan to be denied right before closing.
Changing JobsQuitting or switching jobs can disrupt proof of income stability. If you plan to move, wait until after closing.
Tip: Avoid these actions for about 1–2 weeks during the review process.



3. What to Do If You Receive Conditional Approval

When the underwriter issues a conditional approval, the processor will compile a list of conditions and share them with you.

  • Letter of Explanation (LOE): A written explanation for large deposits or irregular transactions.
  • 48-Hour Golden Time: Submit requested documents or LOEs within 48 hours to stay on track for your closing date.
CategoryRequired Documents
Income Conditions• Additional recent pay stub
• YTD Profit & Loss statement
• Updated verification of employment (VOE)
Asset Conditions• LOE + supporting documents for large deposits
• Bank statement for the account holding your down payment
Property/Third-Party Conditions• Appraisal-related items (e.g., photos showing completed repairs)
• Extra documents required by HOA
• Updated insurance binder with revised coverage
Q. What are “conditions”?
They’re items you must satisfy for the underwriter to finalize approval.
Conditions are typically classified into PTD and PTF:
  • PTD(Pre-Closing Conditions) : Must be cleared before closing.
  • PTF(Post-Closing Conditions) : Can be completed after closing.
  • Q. It’s been days since underwriting started, and I haven’t heard anything. Is that normal?
    Yes. Most of the time is spent reviewing your documents and processing the file. If an issue comes up, your loan officer or processor will contact you immediately.
    If you’re worried, feel free to reach out to us anytime 🙂
    Experience Loaning.ai’s 70% faster approval

    Perfect Scrubbing = Faster Approval

    Delays often happen because the initial document package wasn’t properly organized.

    At Loaning.ai, a professional processor thoroughly scrubs your file from the very beginning.

    Conquer the toughest part of the mortgage process with Loaning.ai’s expertise 🙂

    ✓ Documents prepared in underwriter-preferred format
    ✓ Pre-check for risky transactions (e.g., large deposits)
    ✓ LOEs prepared in advance for expected questions


    📝 Quick Checklist

    U.S. mortgage underwriting
    Underwriting
    ChecklistDetails
    Current StageHave you confirmed with your loan officer whether your file is currently with the processor or in underwriting?
    Condition ListHave you received the full list of conditions requested by the underwriter, either as a document or by email?
    Document PreparationHave you organized and prepared all required documents and explanations (e.g., LOE) for each condition in one batch?
    Submission ConfirmationAfter submitting your documents, have you checked with the processor to confirm that each condition has been cleared and that no items remain outstanding?
    Get 1-on-1 guidance from a U.S. licensed lender

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