Originally Posted by
invisible
Unless you clarify your situation in advance with Singapore ICA (immigrations and customs authority) and have some written letter/message from them so you can present it when you arrive at Changi, if you try to refuse going thru scanner at the gate you obviously won't get to flight and it will immediately raise suspicion.
This is utter nonsense.
If you cannot -- or do not wish -- to go through the full-body scan, you can opt out. Lots of folks fall into this category -- medically exempt, pregnant, too young, other issues, etc... No one at Changi is going to freak out if you politely say you are opting out. You will be sent to the regular metal detector and then given a full pat-down/wand exam. This is no different than how the TSA handles it. I know this because I have just spoken to executives at CAG and CAAS and both confirmed that this is the case.
To the OP: travel to Singapore without worry, and enjoy your trip.