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Once you register at the CERN registration service (1st floor of building 55 just outside of CERN entrance B), your Primary CERN Account, CERN e-mail address & mailbox are created automatically. At this point you must take the following actions:

Step 1:

Activate your account, to obtain the login name and a temporary password.
You can do this by either:

  • Visiting the CERN Service Desk (building 55, 2nd floor, just outside of CERN entrance B). Please bring your identification documents (CERN access card, identity card or passport).
    A Self Service Account Activation Station is also available for your convenience, and the CERN Service Desk personnel can provide assistance if necessary.
  • E-mailing the CERN Service Desk at from your external email address (from your university or service provider). Please attach a copy of your identification document (identity card or passport).
    Once you have contacted the CERN Service Desk, if it is not possible for you to send a copy of your identification document, you can send a copy by fax at the following fax number +41 22 766 84 89.

The CERN Service Desk is open from 07:30 - 18:30 work days, CEST.

Step 2:

Once you have the temporary password for your CERN account, use the initial account configuration wizard at the address

  • Log in with your login name and the temporary password;
  • Follow the instructions on the screen.

Get Help

In the event of any questions or problems, please contact the ServiceDesk (phone +41 22 76 77777 or mail to

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Created: 12/7/2020
Last reviewed: 12/7/2020
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