The article shares the findings based on participant observation conducted during the 11th World Zoroastrian Congress as well as on the analysis of other resources linked to contemporary Zoroastrians. Paying attention to the internal differentiation of the Zoroastrian world community, it focuses on the components that stand in the way to its integration, as disagreements that refer to customs, religion, or the matter of who the "real" Zoroastrians are. It also discusses the boundaries between those who believe to be Zoroastrians form generations and the outside world, as well as the ways these boundaries eventually can be crossed through conversion or intermarriages.