A flight to a third country (e.g., Argentina) may not be considered sufficient. Passengers report being questioned multiple times (at check-in and boarding) when departing from Istanbul. Some travelers purchase a full return ticket (often with a small overpayment, e.g., 15,000-20,000 RUB) on a single booking and do not use the return segment to avoid issues. An official invitation (e.g., for marriage) detailing the host's address and intent may also serve as proof of long-term stay. Solo female travelers report facing more intense questioning.
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