6453 Fannie Mae DO/DU exception has thrown error


The Request error Fannie Mae DO/DU exception has thrown occurs when submitting a file to Fannie Mae.



  • Invalid Casefile ID
  • Invalid login attempt 



Clear the Casefile ID field

  1. Open the Point file.
  2. Select Interfaces > Fannie Mae > Results.
  3. Click Edit.
  4. Remove the content in the Casefile ID field.
  5. Click OK.
  6. Resubmit the loan to Fannie Mae.

Verify Fannie Mae log in information and delete the Fannie.ini file

Verify that you can log in to the Fannie Mae website.

  1. Go to www.efanniemae.com.
  2. Click Launch DO or Launch DU.
  3. Enter your user ID and password.
  4. If you are not able to log in to the Fannie Mae website, contact Fannie Mae to resolve the login error.

6011 Removing the fannie.ini file