Oh maybe had I printed it in color (didn’t see this notice, maybe new? Maybe because turkey creates such a fuss about the gold card notice before boarding?), It would have been easier in Istanbul.
They first stranded me alongside other passengers where they didn’t like the paper’s (most correctly because no covid19 test results yet, telling the staff it only has to be there before immigration in tpe, rapid test instead of PCR, or quite old test,some other special permit). Had to discuss 20 minutes till they let me on just before the plane left. Had I not been pushing hard, I think I would have been stranded in Istanbul. Basically they photographed my gold card paper then sent it somewhere waiting for confirmation that never arrived…
So if Istanbul (Turkish is the best/cheapest option from Europe to Taiwan right now) get in line early before boarding, and or try to get it checked before boarding opens to give them time, less stress
(At baggage check in in Vienna Turkish airlines looked for a reference number that doesn’t exist on the quarantine form, that was solved within 1-2 minutes…(