If you have a single, combined ticket, K-ETA might be checked before boarding in your departure country (e.g., Russia). Upon arrival in Korea, immigration officers can verify your K-ETA status via your passport, often negating the need for further checks. For separate tickets, where you re-register in the transit country, K-ETA may not be requested in Korea as your onward journey isn't visible. Some travelers reported K-ETA checks even with single tickets during transit. Always verify specific airline policies and K-ETA regulations for your route.
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