Which type of investigation is most commonly used in the SFPC personnel security process?

The National Agency Check with Written Inquiries (NACI) is the most commonly used investigation type in the SFPC personnel security process. The NACI is a comprehensive background check designed to determine an individual's suitability for access to classified information or for a sensitive position within the government.

This process involves a review of various records, including criminal history, previous employment, and other relevant information from federal, state, and local agencies. Its thorough nature helps ensure that all pertinent aspects of a person's background are considered, providing a more complete view of the individual's reliability and trustworthiness.

Other options, while important elements of a broader security clearance process, do not encompass the wide range of checks and inquiries included in a NACI. While criminal history reviews focus specifically on past criminal behavior and financial background checks assess an individual’s financial responsibility, these do not provide the full context necessary for security clearance determinations. Additionally, employee reference verification is valuable in understanding an individual’s work history and character but does not cover the essential government and legal databases accessed in a NACI.