21 Sep San José (capital), Alajuela, Cartago, Heredia, Puntarenas, Limón. Costa Rican Colón (CRC), although US dollars are widely accepted in hotels, hostels, tour companies etc. We whizzed through Costa Rica for a variety of reasons. 29 Mar It's possible to get a forged Costa Rican bill. Hold your larger denomination bills up to the light and check for the hidden bands and any. Does anyone know of a web-site where I can go to print out a conversion cheat sheet to convert US$ to Colones. Related: What are the most popular tours in Costa Rica? Hi Collie our currency goes up and down daily it is very simple multiply the going currency exchange and.