The Department investigates and refers for prosecution City employees and contractors engaged in corrupt or fraudulent activities or unethical conduct. Investigations may involve any agency, officer, or employee of the City, as well as those who do business with, or receive benefits from, the City.

We greatly appreciate your complaints or comments with DOI's mission in mind.

How to Reach DOI: 

• Telephone
  (212) 825-5900
  
  
• Electronic complaint
  Submit an On-line Complaint to DOI 
  
  
• Contact Information for DOI’s Inspectors General
  View the list of DOI’s Inspectors General 
  
  
• DOI’s Other Investigative Units
  View the list 
  
  
• E-mail
  E-mail a message to our Commissioner
  
  
• Mail
  City of New York
  Department of Investigation - Complaint Bureau
  80 Maiden Lane
  New York, NY 10038