Originally Posted by
Steve_Hun
Guaranteed that you don't have to go to landside (unless you miss your connection and you decide to go landside for any reason). The only question we are discussing here whether you arrive to the gate area and can head straight to immigration (because SIN is considered as a safe airport), or first you need to go through transfer security and then to immigration (if SIN is "not a safe" airport). Regardless of the fact that your final destination is AMS, you'll enter the Schengen area in HEL, an area consisting of 26 countries, between which there is no border control and thus passport checks.
Thanks. I would definitely consider Changi a safe airport. On a previous trip, we had to be security screened to get back on to the same aircraft we'd just got off.
Thank you all for your help. I'll take your collective word that it will all go well. It just seems strange to think about border control being in one country but customs being in another. But I'll take your word that that works, too.