72-hour Visa-free Transit, possible?

Marcela, the airlines should be familiar with 72 hours free transit policy. According to other foreigners' experience, the airline ask whether any of their passengers want to make use of 72 hours free transit at least 30 minutes before the flight lands. Thos who want to need to fill forms and then the airlines will inform the Exit-Entry Frontier Inspection at the airport in advance. After the plan arrives, passengers need to go through the procedure at the certain window where their application is processed. Normally, there are signs that lead them to the window directly. If you are worried, you may call your airline in advane and ask them about what the detailed procedure is.