If you are a citizen of the European Union, you can travel freely to Switzerland for short-time visits of up to 90 days. This also applies if you have a valid residence visa/permit of any Schengen member state. If you are from anywhere else, you may need a visa to come to Switzerland, please consider the website https://www.eda.admin.ch/eda/en/fdfa.html for official information.
The ICANN 2024 organization committee will provide you with an official invitation letter, if needed. Please send the request to info@icann2024.org. Please request your visa as early as possible, in order to make sure that you receive it in time to travel to Lugano. The ICANN 2024 organization committee cannot take any responsibility for delayed visa applications.