Mich. Comp. Laws » Michigan Compiled Laws / Chapter 338 / Act 285 of 1965
Michigan Compiled Laws

Mich. Comp. Laws § 338.821 (2026)

Short title.

✓ current as of July 2026
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PROFESSIONAL INVESTIGATOR LICENSURE ACT


Act 285 of 1965


338.821 Short title.

Sec. 1.

    This act shall be known and may be cited as the "professional investigator licensure act".

History: 1965, Act 285, Imd. Eff. July 22, 1965 ;-- Am. 2002, Act 474, Eff. Oct. 1, 2002 ;-- Am. 2008, Act 146, Imd. Eff. May 28, 2008

Notes of Decisions
Cited in 8 cases (1 in the last 5 years), 1977–2023 · leading case: Nastal v. Henderson & Assocs. Investigations, Inc, 691 N.W.2d 1 (Mich. 2005).
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Nastal v. Henderson & Assocs. Investigations, Inc, 691 N.W.2d 1 (Mich. 2005). · cites it 2× “The defendants here, private investigators licensed pursuant to MCL 338.821 et seq., are authorized to "obtain[ ] information with reference to any of the following": (i) Crimes or wrongs done or threatened against the United States or a state or territory of the United States.”
Ravary v. Reed, 415 N.W.2d 240 (Mich. Ct. App. 1987). “1965 PA 285 , MCL 338.821 et seq.; MSA 18.184(1) et seq.”
Schweitzer v. Bd. of Forensic Polygraph Examiners, 259 N.W.2d 362 (Mich. Ct. App. 1977). “If investigative experience has any relevance to qualification as a polygraph examiner, certainly private experience as a state licensed and regulated private investigator, MCLA 338.821 et seq.; MSA 18.184(1) et seq.”
People v. Moore, 446 N.W.2d 834 (Mich. Ct. App. 1989). “However, neither he nor ple was licensed in Michigan as required by the Private Detective License Act, MCL 338.821 et seq.; MSA 18.184(1) et seq.”
Michigan Open Carry Inc v. Clio Area Sch. Dist. (Mich. Ct. App. 2016). “(c) An individual who is licensed as a private investigator or private detective under the professional investigator licensure act, 1965 PA 285 , MCL 338.821 to 338.851. (d) An individual who is licensed under this act and who is a corrections officer of a county sheriff’s…”
Michigan Gun Owners Inc v. Ann Arbor Pub. Schs. (Mich. Ct. App. 2016). “(c) An individual who is licensed as a private investigator or private detective under the professional investigator licensure act, 1965 PA 285 , MCL 338.821 to 338.851. (d) An individual who is licensed under this act and who is a corrections officer of a county sheriff’s…”
Jessica Swider v. David McHugh Trust (Mich. Ct. App. 2023). “Citing the Professional Investigator Licensure Act, MCL 338.821 et seq., the Court reasoned that surveillance conducted to obtain evidence in a lawsuit “is valid and well within the law.”
Gravlin v. Dep't of State Police, 274 N.W.2d 21 (Mich. Ct. App. 1978). · cites it 2× “The narrow question raised is whether § 6 of the Private Detective License Act, MCL 338.821 et seq.; MSA 18.184(1) et seq.”
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