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Certification Unit

The Certification Unit is responsible for licensing private detectives and Watch, Guard, or Patrol agencies, appointing Special State Police, and conducting various background investigations for police-related agencies.

We conduct 8 different types of background investigations for: recruit training candidates, Department of State Police civilian employees, private detectives, Watch Guard Patrol Agencies, Special State Police, Department of State Police interns, temporary employees, and in-state and out-of-state backgrounds requested from outside agencies.

What would you like to do?

Top tasks

Access the Certification Licensing System 

All other tasks

Apply for a private investigator license  View our list of active private investigators  View our list of active watch guards 

What you need to know

Requirements for a private investigator license  Requirements for Special State Police  Equivalency guidelines for Special State Police 

Contact Information

Address

485 Maple Street, Danvers, MA 01923
Directions 

Phone

(978) 538-6128

Business hours, M-F

Fax

(978) 538-6021

More Information

Additional Resources

Employee Affidavit Form (PDF 32.34 KB)
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