Originally Posted by
HIDDY
I can see why it may happen around these parts however only for the locals. My first road crossing into Brasil was with a group of Argentines in a mini bus on a package tour to the falls. When we arrived at the border crossing I was told to keep quiet. Our guide had a quick chat with the official and we were waved through straight away without any ID/Passport checks. Seemingly, had I proclaimed my nationality we would have had to pull over and may have been delayed.
In general, everybody has to go through immigration going in and out of Argentina. But that is not true for either Paraguay or Brazil. It took a bit of effort fighting my way off the crowded bus between Posadas, Argentina and Encarnacion, Paraguay so I could do the formalities. And I know several people who have done day trips from the Brazil side of the falls to Ciudad del Este without going through any formalities.