Deadline: 90 days after your arrival in Switzerland (required by Swiss law)
You have to take out health insurance or, as a student with a EU / EFTA citizenship, apply for an exemption from the mandatory insurance obligation. Should you miss this deadline you will be allocated an insurer at the discretion of the respective authority (which might be very expensive). Read the linked information carefully.
You can download your confirmation of matriculation in myStudies. We recommend downloading the confirmation at the beginning of the semester and saving it. That way you have it at hand whenever you need it (e.g. buying a Swiss SIM card for your mobile phone, residence permit).
In Swiss German, your student card is called "Legi".
Your card is valid beyond the end of the semester, which also applies to your matriculation confirmation. Nevertheless, you only have student status at ETH for the duration you find in Mobility-Online (regardless of the validity date on your card). The departure date of your mobility stay is also relevant for your residence permit and determines when you will be dematriculated.
You will need to validate your card at a terminal for the second semester. Information about how to do this will be sent to you by email towards the end of the first semester.
The following site lists more contacts for you (e.g. student associations, Counselling & Coaching at ETH, Psychological Counselling Service, and many more).
