DOB must invite Third-Party Agencies to use Tertius. Contact DOB via email at [email protected] for more information on how to register for Tertius. Upon registration, use the email address where you received the invitation.

Select a password for your account. It must comply with the following:

• At least 8 character(s)
• At least 1 number(s)
• At least 1 symbol(s)
• At least 1 lowercase letter(s)
• At least 1 uppercase letter(s)
• Does not contain part of username
• Does not contain the first name used for registration
• Does not contain the last name used for registration

To register with Access DC:

1. Select the Register button on the Tertius homepage.
2. Select the Register with Access DC button.
3. Choose the sign-up option.
4. Enter the email address where you received the invitation to register for Tertius, password, first name, last name, and mobile phone number.
5. Receive the verification email and verify your email address as directed. Remember to check your spam folders. If you do not receive a verification email, please contact DOB via email at [email protected].

If you are a registered Access DC user: Follow the link provided in the Tertius invitation: tertius.dcra.dc.gov. Once in Tertius select Login at the top right corner of the screen. You will be navigated to the Access DC home screen. Login as usual.

After verifying your email address in Access DC, you will be redirected to your Tertius account.

If you forget or need to change your password, visit Access DC and select the Need help signing in? option. Next, select Forgot Password? then, enter your Access DC email address as directed.