The Massachusetts Trial Court has revised its 100C petition form. The petition form replaces the old triplicate form and can be photocopied. Here is the link to the Petition to Seal Records Under GL 276, s. 100C from the Trial Court's website. This form can be used in all courts, including the Boston Municipal Court, state District Courts and Superioir Courts.
The 100C petition form is only for sealing non-convictions with a hearing, or for first time drug possession convictions. To seal other types of convictions after the applicable waiting period, or to seal non-convictions after the applicable waiting period, you must use another form to seal cases by mail, which can be found by clicking this link,