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.

Offices of DOI Located at 80 Maiden Lane

How to Reach DOI:

• Telephone
  (212) 825-5900
   

• Electronic complaint
  Submit an On-line Complaint to DOI

• E-mail
  E-mail a message to our Commissioner
   

• Mail
  City of New York
  Department of Investigation
  80 Maiden Lane
  New York, NY 10038

You may also contact DOI by writing to a P.O. Box the City established in 1961 so that citizens could contact the mayor and report graft or other unethical practices.

P. O. Box 100
Church Street Station
New York, NY 10007