Switzerland is part of Schengen. Please check https://www.eda.admin.ch/eda/en/home/entry-switzerland-residence/visa-requirements-application-form.html for more information.
Visitor visa applicants will need an official invitation letter and other documents indicating the purpose of their visit, evidence of funds to cover accommodation, and so on.
If you require an invitation letter please fill in the form:
The letter will then be provided to you by email.
If you have any questions, please send us an email: email@example.com