If you are outside of Nassau County, NY and have an emergency, dial our main number (516) 573-8800. The most efficient method of filing a complaint is via the Office Of Special Investigations Online Complaint Form.Their phone number rings off the hook until they hang up on you. Parts of the Application. This form is broken down into parts, ALL parts must be filled out for this application to be submitted. The Division of Human Rights complaint form is available at the below link. You may use this form to file and submit your complaint online. The Request for Adjournment Form is to be filled out completely. In completing this form employees will be acknowledging in writing that their second job is subordinate to their employment with Nassau County. A promotional examination is also being given for employees of Village of Westbury in the title of Complaint Investigator.