The United States Foreign Intelligence Surveillance Court (otherwise known as FISA court) is a federal court, authorised under the Foreign Intelligence and Security Act (FISA).
The court's main responsibility is to oversee the publication of surveillance warrants for national security operations. Similar to criminal investigations, whenever the American government wanted to embark on a surveillance operation, they are obligated to seek a warrant from the court.
2013 publications of Fisa court opinion documents
Following a freedom of information lawsuit by the Electronic Frontier Foundation, multiple court opinion documents have revealed that the American National Security Agency bypassed procedures ( the United States Signals Intelligence Directive 180 for distributing harvested data across several governmental agencies.. The documents also show that an incredibly large bulk of data was distributed