The preferred method is to use our Online Complaint Portal. There are also paper forms which you can mail to the Board upon request. 1.To file a complaint, use this table to determine the most appropriate agency to send your complaint to. Send a letter detailing the incident(s). A 24-hour complaint line is also available to patients at 1- or 1-. Get the Complaint 2. Please be aware when you fill out a Complaint Form, you are filing a formal, written complaint. The following information summarizes your rights as a patient as outlined in the Massachusetts Patients' Rights Statute, Chapter 111, Sec. You may submit this form anonymously. Print out a Complaint Questionnaire (PDF), fill it out and mail or bring it to the Police Station.