Here is an article for a full explanation of banking and banking services:
[urlhttp://www.godutchrealty.com/costa-rica-banking.shtml]Opening a Bank Account in Costa Rica [/url]
The banking system.
Banking System in Costa RicaI called Banco Nacional (another state bank like Banco de Costa Rica) A check drawn on an international (US included) bank takes 30 - 45 working days to clear. In BAC it takes 12 working days. Some banks have shorter times, for example Cuscatlan takes 8 days, but only 3 days if it is a Miami bank.
To open an account you need your ID, maybe a copy too, a letter of reference from banks in Costa Rica or your home country (as many as possible) and normally a utility bill in your name as proof of your address.