It is the authorization granted to a foreigner to enter to the country, as a nonresident, for a specified time and ask those citizens of countries that immigrate for some reasons requiere and authorization from the National Immigration Service, to enter the country . This authorization is requested from their respective countries (Panama Consulate in your country) or you can request an attorney who resides in Panama. Must meet all the requirements under Migration and if they approved the visa, the Consulate is notified of Panama in that country for the visa is stamped on the passport and the person could travel to Panama.