Join Date: May 2005
Location: SJC
Programs: NZ*G, QF NB, UA 1K, AA ExecPlat, IHG PlatAmb, HHonors Gold, SPG Gold, Marriott Gold, ZE1 PC
Posts: 2,636
Showing your ICN-KUL boarding pass to the duty free sales clerk in SIN will be sufficient. They can add a transit sector to the sales computer which allows them to sell duty free for those transiting KUL to SIN. I've done this a couple of times.