Visitors to Costa Rica must have a valid passport as well as proof of their intent to exit the country before their visa or entry stamp expires, usually within 90 days. All non-resident travelers must possess a return ticket or a ticket as proof of when they intend to exit the country, commonly referred to as an outbound exit or onward ticket.
There are no special requirements related to Covid-19 with the exception of visitors from China, Hong Kong, Macao and Taiwan who have been in those territories during the last 14 days.
These visitors must provide a PCR-RT or antigen Covid-19 test with a negative result that was performed by a laboratory less than 72 hours before their entry into Costa Rica.