Just got back from San Jose Costa Rica, things have changed since I was here last. They have a nice new international terminal but I got to say they need signage telling a person what to do. Since we had our boarding passes we walked to security and was told we had to pay the departure tax first and have our airline stamp our boarding pass and had to walk all the way to the opposite end of the terminal. So in the future we know to do the following:
1. When entering the international terminal - look to your right there is a large desk that say "Depature Fee" (the exit fee was $26 US and they took Visa credit cards but we all had US cash). They will give you a receipt (hang on to this) and another form you needed to complete for your airline.
2. Go to your airline counter and they will check passport, etc and stamp your boarding pass
3. Go to security (all docs checked once again) and then get luggage checked/screened
Then you finally get to go to your boarding area.
Before you are allowed to board your plane then do a manual hand check of everyone's luggege because passagers from domestic flights can enter international boarding areas as well so make sure you give yourself plenty of time. They recommend 2-3 hours prior to departure and we now can see why.
While we were waiting to board, some how the departure fee counter lost one of our friends forms saying that she paid. So the airline rep had to take her passport and the departure fee receipt and walk all the way back to the other end of the terminal (through security) to proof the tax was paid and then walk all the way back!