I had a problem in BOG when I last was there, related to this, I don't think my ticket had the charge on it, but they still made me go to the refunds desk at El Dorado airport and get something stamped, I forget what the process was. I wasn't interested in whether or not I could recover it, but the LAN official said they would claim this back.

I only found out about it the night before departure whilst having a beer with another FT'er who resides in BOG.