Thanks for the comment, but this has nothing to do with customs clearance, Joshua. Please see below.

GuyBetsy... exactly right. TG checked the baggage through to its final destination; TG HKT-BKK and QF BKK-SYD.  QF refused because they won't interline on seperate tickets. It seems we can expect more of this from Oneworld carriers in the future. It is often not possible to make a single boo...

SQ will be through SIN not BKK.

Absolutely correct... often not possible to booking online with one ticket / PNR. So are we being driven back to Travel Agents / GDS?

More ******** to try to force passengers to pay more for services that used to be included in the price of the ticket. Whatever happened to the good old interline agreements? In February, my wife and I checked in baggage in Phuket for a Qantas flight to Sydney via Bangkok, and successfully c...