HOW DO I GET A CHILD SUPPORT ORDER?
What you need for Get a child support order
To get a child support order, you need to file a complaint (a written request of what you're seeking) in court. Start in the Registry of the Probate and Family Court for the county where you live.
If you're married to the other parent
If you're married and seeking a divorce, you file where you last lived together with your spouse if at least one of you still lives in that county. If you've both moved from the county where you last lived together, then you can file in the county where either you or your spouse now lives.
If you aren't married to the other parent
If the other parent hasn't signed a voluntary acknowledgement of paternity (a legal form signed by the mother and father, acknowledging they are the parents of the child) or been determined by a judge to be the parent, file a Complaint to Establish Paternity (CJD 106) in the county where the child lives.
If you aren't married to the other parent but paternity has been established by a voluntary acknowledgment or a court judgment, file a Complaint for Support, Custody, Visitation (CJD 109) in the county where the child lives.
For more information: https://www.mass.gov/how-to/get-a-child-support-order