Administrative subpoenas are used by the government without a warrant more often than most people realize. NSA gathers its metadata based on third-party doctrine.<ref>http://www.washingtonexaminer.com/the-progressive-roots-of-nsas-privacy-violations/article/2566725</ref> Administrative subpoenas are not real search warrants under the [[Fourth Amendment]].
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Administrative subpoenas are used by the government without a warrant more often than most people realize. NSA gathers its metadata based on third-party doctrine.<ref>https://www.washingtonexaminer.com/the-progressive-roots-of-nsas-privacy-violations/article/2566725</ref> Administrative subpoenas are not real search warrants under the [[Fourth Amendment]].