Contact DOI

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
Online Complaint

Note:  If you are seeing 'This page can’t be displayed. Turn on TLS 1.0, TLS 1.1, and TLS 1.2 in Advanced settings ...' message then your web browser does not support the required security settings of this form.  Please update your browser to the latest version before attempting to use this form. 

Contact Information for DOI's Inspectors General
Get the list of DOI's Inspectors General

DOI's Other Investigative Units
Get the list of Units

E-mail
E-mail a message to our Commissioner

Mail
City of New York
Department of Investigation - Complaint Bureau
180 Maiden Lane
New York, NY 10038

In-Person Visits to DOI
Upon arrival at DOI all visitors must complete a health-screening questionnaire prior to being seen in person. The questionnaire must be completed the day you visit DOI.
DOI Visitor Health Screening Questionnaire

Visitas en Persona a DOI
Al llegar a DOI, todos los visitantes deben completar un cuestionario de evaluación de la salud antes de ser atendidos en persona. El cuestionario debe completarse el día que visite DOI.
DOI Cuestionario de Evaluación de La Salud del Visitante