Sign and date the form in the presence of a Notary or Court Clerk. Should you require any assistance to complete this form, please contact (631) 854-9930.These instructions are for use with the Suffolk District Court COMPLAINT FORM (DC-283). Page version of this information is available at the courthouses. Use Form RP524, Complaint on Real Property Assessment to grieve your assessment. After downloading and printing applicable forms, please fill out and mail to: Suffolk County Police Department Headquarters 30 Yaphank Ave Yaphank, NY 11980. Failure to file the completed case cover sheet will result in the rejection of your filing. The fillable form is already in PDF format. To carry out that mission, the Commission is required to collect and review complaints about police officers. If you would like to enter a complaint on a property, please fill out and submit a form and the Building Department will review the submission.