You may need a visa if you are traveling to Switzerland from another country. Visit this website to find out if you need to apply for a visa.
A letter of invitation is provided only after you have completed registration for the conference and paid the conference registration fee. Such a letter may be needed to obtain a visa or permission to attend the meeting. If you require an invitation letter please contact Brianna Orr (email@example.com) via email. The letter will be provided by email. In your email, provide the following information:
Accepted paper number (if applicable)
Accepted paper title (if applicable)
Any other details that your country of residence requires for your visa application.