Yes, travel insurance is a mandatory requirement when applying for a Czech Republic tourist visa. The insurance must have a minimum coverage of €30,000 and should be valid across all Schengen countries. It should cover medical emergencies, hospitalization, and repatriation for the entire duration of your stay. This requirement ensures that you are financially protected in case of unforeseen situations during your travel. Submitting a valid travel insurance policy is essential, and failure to provide it can result in visa rejection.