There are some countries, such as Cuba, Peru or Ecuador, whose inhabitants need to apply for a visa in order to travel to Nicaragua. Also, there are two different types: the consular visa and the consulted visa. To be granted the latter, it must be approved by the Nicaraguan General Directorate of Migration and Aliens. You have all the information in: «Tips, documentation and requirements to travel to Nicaragua«.
You have all the information in: "Tips, documentation and requirements to travel to Nicaragua".