The local money used in Curacao is the Netherlands Antillean Guilder. It's abbreviation in Curacao businesses is Nafl. or sometimes Ang. The Nafl. value is closely tied to the US dollar at $1 US = $1.77 Guilder. This makes it seem like you are always getting a bargain. Just make sure to know the US price and you'll be fine. Over the past decade of visiting I have noticed there is little reason to change my US dollars for Florin because everyone here takes US money. The only thing I do is have plenty of smaller US bills on hand so I can get as close to the cost as possible. Often your will change will be in Florian which makes things more confusing to the visitor.