A $29.00 departure tax has to be paid when leaving the country. Before your check- in process, go to the bank counter inside the airport and pay the fee; the amount could be paid by cash / credit card. Complete the form on the back of the document and present it at the airline counter. You can also request the operator in Costa Rica to do this beforehand for you, you just need to provide copy of the passports and pay $2 extra per person.