In Bulgaria recently they have started cracking down on Visa C (tourist visas, business visas). Meaning you don't just need your visa, you need documentation proving the requirements for the visa, such as funds, reservations, etc. I have students, who are from India, who come to Bulgaria to get some courses in very specific things. The school wants me to pay upfront and take the risk, which for 10 students is like 10.000€. I found solutions for the plane tickets, accomodation, that can be canelled, but how do I insure for the school course? Is there such a travel insurance that covers something like this? I am talking about denial of entry when you are already in the country, not denial of visa whenn you apply. Having a visa and not being let in should be pretty low risk scenario so insurance for it should exist for it?