If you are a citizen of a country outside the European Union or Switzerland, and you want to visit Liechtenstein for less than three months, you need to apply for a visa. The Liechtenstein Embassy in your home country can help you apply.
The application process takes around two weeks. You will need to submit:
your passport with at least six months left before the end of your stay in Liechtenstein (your visa will not be issued until after your passport has been processed)
a photocopy of your passport photo page
evidence that you have sufficient funds to cover your stay (a bank statement, for example).