I see this has become a hot topic and I wanted to share my experience as someone who travels 2-3 times a month and arranges travel for hundreds of people.
At work, I oversee large international and domestic events, meaning that I work with people from all the continents and make accommodations for them to travel to and from the US, as well as south East Asia, Europe and Africa. I’m also a trained airline crew and I must say that a lot of what it has been said here, although not inaccurate, doesn’t take into consideration human error.
This situation should be cut and dry but actually it is not. Airlines CAN and WILL deny you boarding if they consider that the documents used to travel aren’t valid or if they think there’s something wrong with them. If an airline allows someone with invalid documents to travel to the US by air, most likely said airline will be fined.
I personally have encountered many airline employees who don’t even know what a green card is. They are not sure what to do with it and some don’t even have a clue that non US citizens can actually leave and return to the country legally( Delta,JetBlue I’m looking at you ) and his has happened to me in AMERICAN soil.
In many countries, there are not familiar with foreign immigration documents or policies. To a person who is not properly trained they are just looking at an expired document and a random paper saying in a very vague way that they are allowed to travel.
Please also have in mind that for visa purposes an expired green card plus extension letter does not constitute a “valid” green card. Since my green card expired I’ve had to request 3 visas to 3 different countries that usually waive visa requirements if you have a valid, unexpired green card. This applies to multiple visa categories including tourism and transit.
We can go back and forth all we want on this topic but we will never know for sure what could happen. Is a situation that is out of control.
I don’t know about you guys but if I were stranded in a third country where I don’t speak the language and I’m being denied boarding and deported to my country of birth, I’d be terrified and probably would forget everything I know.