The biggest problem is countries where English is rarely spoken (in Russia, for example, check-in staff often doesn’t know it), because of Timatic only being in English.
I would advise you to print a Timatic extract (the Emirates search engine is also Timatic) and underline the relevant section with a pen.
While check-in staff is normally supposed to rely on Timatic, they do often misinterpret requirements, especially at some airports (Zurich, for example, is full of complete noobs).
So by all means arrive early, and don’t be afraid to ask for the supervisor.
Credit:stackoverflow.com‘