Certain stations on the Seoul Subway in Seoul have lost and found centres, known as 유실물센터 (yushilmul centre/senteo). Items are taken to these centres eventually if found. They are as follows:
If an item has been left at a station and not enough time has elapsed for it to be moved to the lost and found centre the item will likely still be at the station. In this case phone the station directly.
If the item has been lost on a train, phone the station at the end of the line. As some trains on the same line have different terminal stations, it is good to always remember the final destination of the train when riding. For example, line 1 has trains that have a final stop at Suwon Station, Byeongjeom Station and Cheonan Station.