There's a lot of info & tips on the following thread:
http://www.australianfrequentflyer....ram/strategy-get-early-jq-check-32055-16.html
This came about when people did Flounge runs & wanted to maximise lounge time ie obtain boarding pass at another port eg if flying BNE/SYD on QF then JQ35 SYD/MEL. The common theme was how do I obtain by JQ35 boarding pass so I don't have to wait until three hours before at JQ checkin.
Anat0l, Bundy Bear & myself did QF8 to JQ35 when the JQ flight was in the same pnr as the QF flight. When I did QF OLCI I was able to select both flights to checkin so printed them out at home. I had a spare orange 'D' sticker which I affixed to the JQ35 boarding pass only as I was classed as an international transit pax so as not disembarking in SYD I did not need a 'D' sticker on the BNE/SYD one.
BB also did OLCI but Anat0l went to the QF checkin counters @ BIT & issued both his boarding passes.
QF have an IATCI agreement to issue JQi boarding passes but not JQd & this can only be done in the QF checkin system if the JQi flight is preceeded by a QFd or QFi flight ie you can't book JQ35 direct through JQ then ask QF for the boarding pass as JQ use the Navitaire system for checkin. QF would only have access to Navitaire if they had the contract to do checkin for JQ at the nominated port.
Some other AFFers were flying QF501 BNE/SYD (QF8 got in too 'late' for them
) & although they didn't get the JQ boarding passes it must have generated a message to JQ because when they went to JQ checkin at BNE domestic who said "oh you're all showing as having checked in already". They were happy to reprint to boarding passes but were a tad concerned because they didn't have the required 'D' stickers but they seemed okay with the idea after everyone produced their own 'D' stickers - it pays to have a few spares.