Originally Posted by
kyanar
Some countries (cough, the US) use check-in/APIS data in lieu of exit immigration. Your departure is as important as your arrival. There's a reason that ICAO has a working group sorting this. Because right now it's a mess that unfairly stings travellers. Especially dual-citizen ones.
How does this actually translate to be a problem for passenger?
That is the part that people keep bringing up here as a concern but have not quite really articulated what is the actual problem.