Thompson, Maria.

National Security Letters allow the Federal Bureau of Investigation to obtain records on individuals from corporations without prior judicial intervention or approval. Statutory changes, most significantly those resulting from the passage of the United States Patriot Act in 2001, have substantially altered the four different federal statutes from which National Security Letters originate. In creating these National Security Letters the government intended to protect its citizens from national security threats. This goal has been regarded historically as legitimate, but the legislation potentially limits rights, which raises the question of whether these letters are acceptable. Drawing on relevant case law and scholarly opinion, I argue that use of these letters is unacceptable and may render the Fourth Amendment's protection of person and property from unreasonable searches meaningless in certain federal investigations.