Originally Posted by
JonathanReez
It's perfectly fine to put anything on the online check-in form, as long as you're 100% truthful when speaking to actual immigration agents. Airlines have zero authority in enforcing immigration law, so it makes no difference what it has in their system. You can even use a different nationality if it helps you check-in online, no one cares. They'll rescan your passport anyway at the gate, correcting whatever information you've entered during online check-in.
This is incorrect. Putting I'm bad info can have bad consequences. Either 1)the info cant be changed (airlines with really awful reservations system) or 2)the info was already sent on to government, who don't take kindly to such errors and might tell airline to refuse you boarding.
I'm not saying either will happen. However, they both might happen.