I am a Greek citizen, my wife is Colombian (does not require a visa to enter the union for 90 days), our children are Australian citizens (they don't require a visa to enter the union for 90 days) (they are also Greek citizens in theory from birth but due to the perversion of the Greek system they cannot exercise that right before we have passed a number of bureaucratic hurdles that take a very long time).
We want to travel to Greece from Sydney and stay for a longer period than 90 days. My wife is registered as my wife with the Greek authorities. In practice there is no way she will not be allowed to stay indefinitely if she wants to. The same holds for my children.
The airline QATAR (they use IATA/TIMATIC) however do mention that she may be denied passage at the airport if she does not have a return or onwards ticket.
Can she (and my children) really be denied passage for that reason?
(I know for a fact that she cannot be denied entry as she is entitled to enter the EU with me at all times as long as we can prove that we are married, see the Europa link below)
Is there something that I can do? (I have already sent a question to the EU through the europa portal here: http://europa.eu/youreurope/citizens/travel/entry-exit/non-eu-family/index_en.htm)
UPDATE: As expected the answer from the EU commission website came and it said that we are fine to travel on a one-way ticket as far as EU law is concerned.
UPDATE2: I have contacted TIMATIC (https://www.timaticweb2.com/contact) with that and I am waiting for their answer.
UPDATE3 (After the travel): I can report that we were not even asked about onward travel, but that probably should not be relied upon, as unfortunately the behaviour of the airline staff seems to be random in applying their misinformation (as I later found out when another relative from Colombia traveled here and had trouble in Medellin for a different reason). Good luck