NSL Archive – A record of publicly disclosed national security letters

In plain words

NSL Archive is a database tracking publicly disclosed national security letters issued by the U.S. government. It documents who received NSLs, how many were issued, when disclosures occurred, and the disclosure methods used. National security letters are administrative subpoenas used to gather information for national security purposes without prior judicial approval, and they can only request non-content information under laws including the Stored Communications Act and Fair Credit Reporting Act. The archive serves researchers, journalists, and citizens interested in government transparency and surveillance practices.

written from the facts on this page · September 2026

From the sources

Tracking the disclosure of NSLs: who, how many, when, and how the disclosure occurred. A national security letter (NSL) is an administrative subpoena issued by the United States government to gather information for national security purposes.[citation needed] NSLs do not require prior approval from a judge. The Stored Communications Act, Fair Credit Reporting Act, and Right to Financial Privacy Act authorize the United States government to seek such information that is "relevant" to authorized national security investigations. By law, NSLs can request only non-content information, for example, transactional records and phone numbers dialed, but never the content of telephone calls or…from nslarchive.org

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