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Fix a transport problem
Clear steps for the moment something goes wrong. Open a Korean message to show staff when you need it.
01 Forgot to tap off the bus What to do after leaving a Seoul bus without tapping your transit card, and what it means for your next transfer. 02 Transit card declined A quick checklist when a Korean bus or subway reader does not accept your transit card. 03 Balance too low to exit How to add enough balance to leave a Seoul subway station when the exit gate rejects your T-money card. 04 Entered the wrong subway gate What to do before tapping out and paying again after entering the wrong side of a Seoul subway station. 05 Missed a KTX train What to do immediately after missing a KTX train and where a post-departure refund must be requested. 06 Booked the wrong KTX station How to correct a KTX ticket with the wrong departure or arrival station before the train leaves.
Procedures checked Aug 2026 · Official Seoul and KORAIL sources