For Official Use Only (FOUO) is a designation used primarily by U.S. government agencies to identify information that is sensitive but not classified. FOUO information is not meant for public release and should only be shared within authorized personnel or organizations. While it does not carry the legal weight of classified information, improper disclosure can still pose risks to operations, privacy, or security. Commonly, FOUO is applied to documents, emails, or data that, if released, could cause administrative, legal, or operational complications. Agencies use FOUO to ensure sensitive information is handled with care and only accessible to those with a legitimate need to know.