The Multifamily Selling and Servicing Guide has been simplified and rewritten. We restructured the Guide to maximize delegation and deliver an improved customer experience. We updated our pre-review categories and defined our new underwriting requirements to provide maximum clarity — making it easier for you to deliver loans.

DUS Navigate™ is your portal to our simplified and restructured Multifamily Selling and Servicing Guide and Multifamily Underwriting Standards (Form 4660). 

Technical Frequently Asked Questions

DUS Navigate is publicly available. However, certain confidential and proprietary information (e.g., Form 4660) is only accessible to registered users. To receive log in access to confidential publications, please coordinate with the Technology Manager at your organization to confirm that you have been onboarded to the “DUS Navigate” application with the appropriate “DUS Navigate” role. If you are still unable to log in, contact your Technology Manager or email us at [email protected].

DUS Navigate is accessible to all users. However, some functionality (e.g., viewing Form 4660) requires log in access, which can be requested through Technology Manager.

Please contact your organization’s Technology Manager. 

DUS Navigate is designed to be compatible on iPhones, iPads, Androids, and other personal devices. By accessing the DUS Navigate website on your personal device, you will have the same functionality as a desktop computer. Fannie Mae is working to improve the mobile experience in future releases.

DUS Navigate is accessible to all internal Fannie Mae employees/contractors to view the guide content and Form 4660. If additional access is needed, please contact your Business point of contact.

The Technology Manager website is located at For any Technology Manager questions, please review the FAQ page at 

Additional questions? Contact us at [email protected].

Additional Help

Have a question? Contact the Technology Support Center.

Call Us at 1-800-2FANNIE (1-800-232-6643). Press 1, then press 1.

Hours of operation: 24 hours a day, 7 days a week, excluding the following holidays:

  • New Year’s Day
  • Memorial Day
  • Independence Day
  • Labor Day
  • Thanksgiving Day
  • Christmas Day

NOTE: On the evening prior to a holiday closure, the Technology Support Center will close at 8 p.m. ET and will reopen the day after the holiday at 8 a.m. ET.

Call Center Quick Reference Guide

Please note that the Web Chat link is only available to registered technology application users.

Fannie Mae applications are currently compatible with computers that run on the Microsoft® Windows® 8.1 Enterprise Edition. 

Your Web browser must be set to enable Java™ and JavaScript™ and to accept cookies. The following browsers have been tested with our secure servers and are necessary for secure connections:

  • Microsoft Internet Explorer® 11
  • Mozilla Firefox® Version 38.1.1
  • Google Chrome™ Version 46

For additional information, see the Technology Requirements: Configurations for Applications.