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National Security Letters — Part 1

1188 pages · May 11, 2026 · Document date: Dec 4, 1981 · Broad topic: General · Topic: National Security Letters · 1018 pages OCR'd
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SRRCRET Typical NSL Retention and Database Use Phone Records: SYNSL toll billings records are A em into Telephone Applications (TA) after receipt. Most information in TA is uploaded into.FB of analysis. TA is shared in two forms: a “raw” version that.contains individual phone call events, and an “indexed” version that does not contain individual phone bl call events. Most indexed TA information is a : Wand FTTTF. The information can also be uploaded from TA to other applications (such mn analysis. NSL-derived information is also b2 placed in Automated Case Support (ACS) with case information. With the exception of designated restricted case files, most ACS information is available as a dataset in Investigative Data Warehouse (ID W). bl Phone Records Other applications ACS (Case Information) TA( indexed) Email] Records: $) NSL electronic transactional information is typically entered into ACS upon receipt. With the exception of designated restricted case files, most ACS information is available as a dataset in IDW. lon Counterterrorism email information can be manually entered into FBI Email information may in some cases be entered into spreadsheets and other dalabases for analysis. Email Records bl Spreadsheets /ODatabases Financial and Credit Information: (U) Financial and credit information is typically entered into ASC upon receipt. ACS mformation ts uploaded into Investigative Data Warehouse (IDW). Financial and credit information may in some cases be entered into spreadsheets and other databases for analysis. Financial/Credit Information Spreadsheets /Datakases DATE: 06-15-2007 CLASSIFIED BY 675179/DNH/KSRSRY REASON: 1.4 (9g) DECLESSIFY OW: 08-15-2032 ALL INFORMATION CONTAINED HEFEIN 15 UNCLASSIFIED EXCEPT WHERE SHOWN OTHERWISE s5fret
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