If you have accidentally created a duplicate account, you will usually receive an email notification informing you that a duplicate has been detected. The following page provides instructions on how to merge accounts: Switch edu-ID - Account Merge.
If the email address associated with one of your edu-ID accounts is no longer active, you can try logging in by adding “.inactive” to the end of the email address. If this does not work, or if you no longer remember the password, please contact eduid-support@switch.ch.