While answering another post it occurred to me that I haven't seen any mention about the reciprocity fees supposed to be collected in advance at all air and land points of entry into Argentina starting very shortly. As I understand it, you are supposed to go on line before arriving at the point of entry and pay any fee due by credit card. You will not be able to pay on arrival, which is a big shift. You will also be required to pay the fee no matter how you're arriving, which is an even bigger shift. Formerly, land arrivals were exempt.

As I understand it, the advance payment requirement for air arrivals takes effect December 28th 2012. The policy for land arrivals is due to take effect Jan 7th, 2013.

This only applies to people carrying passports who have already had to pay when arriving on international flights into B.A. That includes, of course, Americans, Canadians and Australians, plus some more countries: hopefully, you know who you are.

Please note that I'm only reporting what I heard from usually-reliable sources. If the whole thing falls flat, it won't be the first time that's happened. Probably, you'd prefer not to spend the entire day riding over one of the unpaved high passes from Chile, only to be turned back at the border just as it starts to get dark and cold. Check it out yourself, and do whatever needs to be done.

I've got no information about the specifics, but I've seen enough talk about it elsewhere that it must be easy to learn more about. Google is, in certain respects, your friend.

Hope that's helpful.

Mark