Learning Center
Desktop Underwriter Learning Center
Optimize your use of the industry-leading automated underwriting system
Access the knowledge and tools you need to confidently implement and use Desktop Underwriter® (DU®) and its latest enhancements. Whether you're just getting started or looking to stay up to date with new features, you'll find step-by-step guides, best practices, and resources to help you do more with Desktop Underwriter.
General resources
Job aids and reference guides
Resolving Common DU Error Codes
DU Credit-related Error Codes Job Aid
Valid Property Type Combinations
Getting started
Learn how to set up the service to validate borrower assets, income, and employment.
Using the service
Learn how to optimize your validation workflows, work with borrowers, and more.
Technology resources
Password reset
Forget your password?
Technology Support Center
Contact us for help with Fannie Mae technology applications.
