Selling Guide

Published June 3, 2020

The Selling Guide is organized into parts that reflect how lenders generally categorize various aspects of their business relationship with Fannie Mae. To begin browsing, select from any of the sections below. You may also download the entire Selling Guide in PDF format.

View All Selling Policy Updates

Download PDF

Hint: Ask in a form of a question.

For best results, pose your search like a question.

B3-2-11, DU Underwriting Findings Report (10/24/2016)


This topic contains information on the DU Underwriting Findings report, including:



The DU Underwriting Findings report summarizes the overall underwriting recommendation and eligibility component of the loan casefile and lists certain steps necessary for the lender to complete the processing of the loan file.

Specific messages are provided for each individual loan casefile. These detailed messages are designed to assist lenders in processing and closing loans. However, the level of documentation recommended by DU may not be adequate for every borrower and every situation.

The DU Underwriting Findings report is divided into sections. Each section contains a different type of message. Certain messages will be provided based on the DU credit risk assessment. For example, some messages are returned only on Approve recommendations, while other messages are returned only on Refer with Caution recommendations.


Potential Red Flag Messages

DU provides a number of “potential red flag” messages designed to help the lender detect inconsistencies in the loan casefile. Neither the presence nor absence of these messages alters the lender’s responsibility to ensure accurate information in all areas of the loan process or otherwise comply with applicable law, including the Fair Credit Reporting Act.


Note: The appearance of these messages does not affect the underwriting recommendation from DU. Rather, they are designed to help lenders detect inconsistencies. Furthermore, the absence of any of these messages does not indicate or imply Fannie Mae’s acceptance of the data submitted to DU.


The following lists potential red flag messages:

  • Excessive resubmissions: A message alerts lenders when an unusually high number of loan resubmissions may be the result of data manipulation.

  • Manufactured home caution: A message alerts users when a property type was not submitted as a manufactured home, but Fannie Mae’s property database indicates that it may be a manufactured home.

More information can be found in the Desktop Underwriter Potential Red Flags Messages matrix or by contacting the lender’s Fannie Mae customer account team.

Have You Tried Ask Poli?

Poli knows. Just ask.

Ask Poli features exclusive Q&As and
more—plus official Selling & Servicing

Try Ask Poli

Related Articles

B3-2-01, General Information on DU (08/07/2018)

IntroductionThis topic contains general information on DU, including: Overview  Underwriting with DU  DU Underwriting Reports  Loan...

Read more

B3-2-02, DU Validation Service (06/03/2020)

IntroductionThis topic contains information on the DU validation service, including: General Information  Authorized Vendors and Verification...

Read more

B3-2-03, Risk Factors Evaluated by DU (12/04/2018)

IntroductionThis topic contains information on the risk factors evaluated by DU, including: Risk Factors Evaluated by DU  Credit History ...

Read more

Have guide questions? Get answers to all of your policy questions, straight from the source.

Get Started
Having Issues with Seeing this Page Correctly?

Use Firefox or Chrome   How to do a hard refresh in Internet Explorer
We recommend that you use the latest version of FireFox or Chrome.

Download Firefox
Download Chrome
  A hard refresh will clear the browsers cache for a specific page and force the most recent version of a page.
    Hold the Ctrl key and press the F5 key.

Email Us
If you still have Technical Support questions, feel free to