Originally Posted by
Boleslav
I am dual citizen of US and CR (EU). Will travel to Bolivia, where US citizen has to pay $135 for visa while EU has free visa.
Based on my readings when checking in the US for the flight with destination Bolivia, I will show the airline my EU passport. (and when checking in Bolivia onto US headed flight I will present the airline with my US passport).
So here’s the catch, that I can not solve on my own

When I used to have a green card, the airline always wanted to know how I will get back to the US, so upon the check in to travel OUT of the US, I had to show them the green card (and of course I had to show the green card upon boarding the US headed plane).
If I leave US on my EU passport and the airline asks me how do I plan to return back to the US, what do I do? Tell them I have two passports ?
Thank you.
This is not an uncommon type of question on travel forums.Many people have two passports with different visa requirements.
You board your flight to leave the US on your US passport.
When/if the airline personnel ask about lack of a visa for Bolivia, you show them your EU passport and say you will use it to enter Bolivia.
For the return, use your EU passport to board and the US passport to enter the US and for any connected paperwork to fill out on board the aircraft that is for entry.