|“||We be privateers, not pirates, Master Gibbs. And in the King's name, will behave as such.||”|
A Privateer is a ship's captain who has been authorized and received a certificate of mark from a government allowing him to plunder vessels of their political enemies - or in other words, a legalized pirate.
In Pirates Online, a pirate can earn ranks as a Privateer called infamy badges as well as finish as quest fighting for both the Spanish and French factions laying claim to the Caribbean. See Ship PvP.