To U.S. Applicants:
I have finally managed to receive the text of the Treaty signed between U.S. and Portugal that grants 60-day visas to U.S. citizens with ordinary passports (that’s what most of us have). I am planning to have it on hand when I exit Portugal in a month in case someone starts questioning my status. Frankly, I don’t anticipate issues, but just in case, it might be good to have it on hand if you overstayed your automatic 90-day Schengen visa.
Text of US-Portugal Visa Treaty.pdf (1.3 MB)
Please note, this does not allow you to travel throughout Europe, but you can stay in Portugal beyond the 90-day limit if it is honoured by SEF at the airport. Book your flight to a non-Schengen destination so that you go through the border control in Lisbon.
Good luck!