I know the fee only applies to people who enter Chile by air at SCL airport, could fodorites please tell me how large the stamp is and if I will need a full page in my passport for the stamp.

Thanks.

In Fb 2011 we enter Chile at SCL. we got the normal stamp maybe 1" diameter ?) on the passport itself. The reciprocity fee is a 2" x2" (approximately) piece of paper that they stapled to our passport page on top of the stamp.

how much is the fee?

$160 if you're a U.S. citizen

They just staple a small piece of paper to one of your passport pages.

I don't know if it is possible to pay the fee in advance somehow. we arrived santiago late at night early this month and only one window was open for processing the reciprocity fee. Since most people pay by credit card the line moves very slowly. Three flights had come in and we had to wait over an hour and a half in line. There were other employees at other windows but they were not processing anybody. Not a great welcome to the country.

That's about the same time I spent in the non-US citizen passport control line last time I entered the US. These things are always tedious.