This is why you will find that some destinations you cannot hold an eticket on... this is due to immigration constraints.. however you will find that on the eticket receipt it will still state that you may need to show it to immigration authorities, this also happens in Australia and probably numerous other destinations.
So whats the point of etickets you may ask if you still need to carry a piece of paper... well in all honestly it really is to streamline the airlines paperwork and not really to convenience the passengers although they love you to think this!! it means less staff are needed therefore more profits!!
at least that is the idea... in my opinion!!
