Private investigator services in Missouri are governed by the RSMo § 324.1100 et seq. and regulated by the Missouri Board of Private Investigator and Private Fire Investigator Examiners (Division of Professional Registration). A state-level license is required to operate as a private investigator for compensation in Missouri.
Quick Facts: Missouri PI Licensing
| License required | Yes |
| Licensing authority | Missouri Board of Private Investigator and Private Fire Investigator Examiners (Division of Professional Registration) |
| Governing statute | RSMo § 324.1100 et seq. |
| Official license lookup | https://pr.mo.gov/licensee-search.asp |
| Authority website | https://pr.mo.gov/private-investigators.asp |
| Last reviewed | 2026-05-17 |
Verifying a PI's License in Missouri
Before retaining any private investigator in Missouri, verify the individual’s license is active and in good standing. The Missouri Board of Private Investigator and Private Fire Investigator Examiners (Division of Professional Registration) maintains a public license search at https://pr.mo.gov/licensee-search.asp. Search by the individual’s name or company name; the record will show the license number, status, and any disciplinary history on file.
What This Means for Hiring
Missouri’s licensing requirement means the investigator you hire has, at minimum, completed the state’s training and background screening process. It does not guarantee competence on your specific case — surveillance, family-court, corporate, and skip-trace work each demand specialized experience. When evaluating a Missouri PI, ask about case-type specialization, evidentiary chain-of-custody process, and prior testimony in the jurisdiction where your matter is pending.
Reference: All 50 States + DC
For licensing requirements in other jurisdictions, see the full PI licensing reference map.