A formal personal interview is not always mandatory for a Liechtenstein Tourist Visa. However, all applicants are required to appear in person at the Swiss Embassy or the authorised Visa Application Centre to submit their documents and provide biometric data, including fingerprints and a photograph. In certain cases, the Swiss Embassy may request an interview to clarify the purpose of your visit or to verify specific details in your application. It is important to be well-prepared with all relevant documents and clear answers regarding your travel plans at the time of your appointment.