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).  Please note:  This new version of the Guide became effective for all deals registered in DUS Gateway® on or after August 1, 2019.  Deals registered through July 31, 2019 must use the PDF version of the previous Guide.

Frequently Asked Questions

  • Registered through July 31 
    Deals registered in DUS Gateway® through July 31 must be underwritten and delivered per the current Guide and must be delivered by December 31, 2019.
  • Registered on or after August 1
    Deals registered in DUS Gateway as of August 1 will see the “new” Guide drop down categories in DUS Gateway and must be underwritten and delivered per the new Guide.

AllRegs is not going away. DUS Navigate is an alternative interactive tool in addition to AllRegs.

AllRegs will continue to publish new Guide content on its effective date. Thus, AllRegs will continue to display the current Guide until July 31, and then will display the new Guide on August 1 when it becomes effective. After August 1 AllRegs will display the same content as DUS Navigate.

Your Deal Team will be happy to answer any deal-specific questions!

Fannie Mae is actively rewriting Parts IV and V. As new content is ready, it will be published in both DUS Navigate and on AllRegs.

  • Requirements
    Mandatory conditions that must be satisfied for all Lender-delegated Mortgage Loans and activities.
  • Guidance
    Best practice guidance to inform and support a Lender’s delegated analysis and decision-making.
  • Operating Procedures
    Required steps or processes that must be followed.

The Form 4660 is a confidential document that is not available to the public. Only Lenders and internal Fannie Mae users who have access and log in to DUS Navigate will be able to access the Form 4660 link in the upper right-hand corner.

  • Entire Guide: From anywhere within DUS Navigate, there is an icon in the upper right-hand corner to print/download the entire Guide.
  • A specific Chapter or Section: From within a specific Chapter or Section, there is a print/download icon directly below the Chapter or Section name that allows you to print or download the specific Chapter or Section.

From within a specific Chapter or Section, there is an email icon directly below the Chapter or Section name that uses your normal email settings to open a new email with a link to the selected Chapter or Section.

From within a specific Chapter or Section, there is a Related Documents icon directly below the Chapter or Section name that opens a new tab in your browser and displays a hyperlinked list of all of the associated Business Forms, Loan Documents, and other documents relevant to that Chapter.

You can also access Business Forms, Loan Documents, and other reference material directly on

You must log in to enable the bookmark functionality.

From within a specific Chapter or Section, there is a bookmark icon directly below the Chapter or Section name that will display as a filled-in star when the content is bookmarked. To remove the bookmark, simply click the bookmark icon again to un-fill the star. Bookmarked/favorite content can be accessed directly from the My Profile link in the upper right-hand corner.

From within the Guide, a navigation menu appears on the left-hand side displaying an outline of the Guide. Simply click the expand/collapse icon on a selected Part/Chapter/Section to see the titles of the associated Chapters and Sections. Click on the any Chapter or Section title and the content will display on the right-hand side.

From the main DUS Navigate website, there is a section titled Recent Guide Communications that has links to all Guide Updates, Lender Memos, and Lender Letters.

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 and Share My Desktop links are 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.