I'm backpacking in South America and have found myself in an interesting situation. I was travelling in Paraguay and got to Ciudad del Este, from there I took a local bus across the river to Foz do Iguaçu in Brazil. There's virtually no Customs on the border (you can see large trucks being stopped but not pedestrians, cars or buses) and I crossed without hitting Paraguayan or Brazilian customs.
Now I'm in Brazil without a Paraguayan exit stamp or Brazilian entry stamp.
In the next day or two - I'm going to Puerto Iguazú in Argentina.
Does anybody know how Customs will react to me not having these stamps?
What should I do to minimise any hassle when I reach the Argentinian / Brazilian border?