https://www.ivisa.com/serbia-self-assessment-form The Serbian Orthodox Church is famous for its strict rules. And while it has its share of followers, many Serbs adhere to the Islamic faith. A Belgrade quiz will tell you that a person who isn't a Muslim is regarded as a heretic by the Church. Being found guilty of being a heretic may cause you lots of problems in future. That is the reason why an applicant must have his own documents to show his or her religion. If you are one of the few who do not have your own spiritual documentation you might want to think about this kind of an examination.