[supernova87a]

One lesson I learned the hard way (somewhat related to last minute panic at the airport) is: don't try to update/change something in your online check in process that has working, before a critical check-in time, because it can always be fixed at the airport.

Several years ago I got a new passport, and thought to use that to check in online for an intl flight. The app had my old passport and would have worked fine, but puked on scanning the new passport, and suddenly I was not / could not be checked in.

I started going to the airport, to arrive at my usual 1 hr before, but got delayed by traffic. Only by miracle of begging supervisor to reopen check in did they allow me to do it.

I should've just went with the old passport in the record that worked, and changed it out at the gate/checkin counter when at the airport.