Security - Generating and Using Duo Self-Service Backup Codes

Instructions for generating a list of one-time-use Duo backup codes for those times when your primary device is not available and steps for using those codes.

About Duo backup codes

  • Backup codes will never expire.
  • Backup codes cannot be shared with others.
  • You will get 10 codes at a time.
  • Each code is one-time-use only.
  • You can only generate 10 codes at a time. Generating additional codes will invalidate all previous codes. In other words, you cannot repeat the process to build a stockpile of 20, 50, or 100 codes. If you use your 10 codes, you can always generate more.

To generate Duo backup codes

  1. Go to
  2. Click Generate Codes button.
    Generate Duo Backup Codes page with Generate Codes button

  3. Enter your campus NetID (username) and password when prompted.
    Authentication page for Duo backup codes

  4. Complete Duo two-factor authentication.
    Duo authentication page for Duo backup codes

  5. Close all windows of your browser to log out.
  6. Wait a few minutes.
  7. Check your campus email.
    Sample email with Duo backup codes

  8. Print or copy the Duo codes from your email to a safe place.
  9. Delete the email.

To use Duo backup codes

  • When prompted to choose an authentication method, select Enter a Passcode.
  • Enter one of your codes.
  • Click Log in.
  • Remove that code from your list; it will no longer work.
If you have questions, please contact the ITS Help Desk at 608.342.1400 or  You may also visit the Help Desk on the first floor of the Karrmann Library.

Keywords:duo codes one time one-time lost passcode temporary   Doc ID:109859
Owner:Deb M.Group:UW Platteville
Created:2021-03-23 15:31 CDTUpdated:2021-03-24 13:54 CDT
Sites:UW Platteville
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