We can provide you with guidance on how to fill out forms. • We can usually answer questions about court deadlines.You can file a complaint at any time using our online form. NOTICE: This is a public document, which means the document as submitted will be available to the public upon request. Kindly fill the form and click the 'Save as PDF' Button. The 'RESET' Button clears all the fields you have filled-in, so you can start over. Complaint, you, or your attorney, must file a written Answer to the Verified Complaint and proof of service within thirtyfive. A complaint should contain a statement of the facts on which the claim is based, showing that the pleader is entitled to relief, and a demand for judgment. To sue someone in Massachusetts, you have to file a complaint with the clerk of the court. A complaint is not a specific form.