Originally Posted by
fassy
Never understood the 'show a itinerary with the fight back' question. Nobody can prevent you from just recooking that flight after entering the country. Also a slip of paper with some flight numbers which can be easily fabricated says exactly nothing as the immigration agent has no easy way of validating the ticket.
and actually I haven't encountered that for a long time. Worst was: 'when do you (intent to) fly back?' And just saying end of month/week/whatever worked, no proof required anywhere.
The airline will have to pay to return you if you are deemed inadmissible at immigration, and onward travel is one of the requirements in some places. It can save them money to check, but after you've entered the country then it's no interest of theirs.
OP: Two printed copies of every booking on an itinerary. You never know when you'll lose one or when it might be kept by the check in agent or whoever.