Hi MT_Switch

It’s been a few years since I’ve transited through SIN but as far as I’m aware, the procedure hasn’t changed much. When you disembark, you should be given a transit boarding pass and you will go in to the departures area. You will then re-clear security at the gate before boarding for the onward leg.

No immigration, customs or re-checking in should be required.

​​​​​​​S