This service allows you to check in your checked baggage at the airport yourself. The Self-Service Bag Drop is available for flights of chosen airlines. To use this service, passengers need their boarding passes, which can be acquired during on-line check-in or at the Self-Service Check-in kiosk.
Self-Service Bag Drop facilities are available at check-in counters number 130–135 in the Terminal 1 Departures Hall and check-in counters number 272–295 in the Terminal 2 Departures Hall. Here the passenger scans the bar code of their boarding ticket, prints the baggage tag and attaches it to their baggage, which then will be sent to the baggage sorting area and loaded onto the aircraft. Detailed information here.