Costa Rica's recently privatized postal system is reasonably efficient, though you may have problems sending and receiving letters from remote areas. The most reliable place to send mail overseas from is San José's Correo Central , or main post office, which is also the best place to collect post. In most cases - especially in Limón province, where mail is very slow - it's probably quicker to wait until you return to San José and post mail from there. Opening hours for nearly all Costa Rica's post offices are Monday to Friday from 7.30am to 5 or 5.30pm. Those in San José and Liberia also have limited Saturday hours.