Complaint for Modification (CJD 104): Changing a Massachusetts Custody Order

Life after a divorce judgment doesn't freeze. A parent gets a job offer in another state. A child starts struggling in school under the current schedule. Work hours shift, making the existing parenting plan unworkable. When circumstances change significantly, Massachusetts law allows either parent to ask the Probate and Family Court to modify the existing custody or support order.

The vehicle for this is the Complaint for Modification (Form CJD-104) — a formal court filing that reopens the case to adjust custody, parenting time, child support, or all three.

The Legal Standard: Material and Substantial Change

Massachusetts courts don't modify custody orders because a parent is unhappy with the arrangement or wants a minor tweak. To succeed, the parent filing must prove:

1. A material and substantial change in circumstances has occurred since the last order
2. The proposed modification serves the child's best interests

Both prongs must be met. A significant change alone isn't enough if the modification wouldn't benefit the child. And even a beneficial change requires showing that circumstances have genuinely shifted — not that the original order was wrong.

What Qualifies as a Material Change

Courts have recognized these as material changes:

• Relocation — a parent needs to move a significant distance, disrupting the current schedule or school district
• Changes in work schedule — new employment or shift changes that make the existing custody rotation impossible
• Child's developmental needs — a young child who now needs more time with the non-custodial parent, or a teenager whose school and social life require a schedule adjustment
• Substance abuse or safety concerns — documented evidence of drug or alcohol abuse, domestic violence, or neglect
• Parental alienation — one parent systematically undermining the child's relationship with the other
• The child's expressed preference — a child of sufficient age and maturity whose preference has changed

What Typically Does Not Qualify

• General dissatisfaction with the current schedule
• Minor disagreements over parenting style
• A child's brief, age-appropriate preference for one parent over the other
• Financial changes that don't affect the child's wellbeing (wanting to pay less support without a genuine income change)

How to File the CJD-104

Step 1: Obtain and Complete the Form

Form CJD-104 (Complaint for Modification) is available from any Probate and Family Court registry or online through mass.gov. The form requires:

• Your case number from the original divorce or custody order
• The specific provisions you're asking to change (custody, parenting time, support, or a combination)
• A clear statement of the changed circumstances

Step 2: Prepare Supporting Documents

Along with the CJD-104, file:

• An updated Rule 401 Financial Statement — required if child support is at issue
• A supporting affidavit detailing the changed circumstances with dates, specifics, and evidence
• The existing court order you're seeking to modify

Step 3: File and Pay the Fee

File the complaint at the Probate and Family Court registry in the county where the original order was entered. The filing fee is $100 plus the $15 surcharge and $5 summons fee, totaling $120. Fee waivers are available.

Step 4: Serve the Other Parent

The complaint and summons must be served on the other parent by a constable or deputy sheriff. Personal service is required — you cannot mail the papers or deliver them yourself.

Step 5: The Hearing Process

After filing and service, the case enters the court's scheduling system. The Pathways case management system may assign the case to mediation first, especially if the modification involves scheduling disputes rather than safety concerns.

At the hearing, you'll need to present evidence supporting both the changed circumstances and why the modification benefits the child. This is where documented evidence — school records, work schedules, communication logs, medical records — matters far more than verbal testimony alone.

Relocation: A Special Category

If you're filing to modify custody because you or your co-parent wants to move, Massachusetts applies additional scrutiny under M.G.L. c. 208, § 30. The landmark Yannas v. Frondistou-Yannas case established the framework:

• A parent with sole physical custody must show the move is motivated by a "real advantage" (not just spite or to distance the child from the other parent) and that the move is in the child's best interests
• A parent with shared physical custody faces a higher bar — the move must pass the standard best-interests analysis, which heavily weighs preserving the child's relationship with both parents

In either case, removing a child from the Commonwealth without the other parent's written consent or a court order is prohibited.

Modifying Child Support

Child support modifications follow the same CJD-104 process but apply the 2025 Massachusetts Child Support Guidelines. The court recalculates support using both parents' current incomes, parenting time split, and childcare costs. A significant income change (typically 20% or more) or a change in the parenting time percentage usually meets the material-change threshold for support.

Protecting Your Current Arrangement

Whether you're filing a modification or defending against one, understanding what the court considers — and what evidence carries weight — is essential. The Massachusetts Child Custody & Parenting Plan Guide covers the modification process, the Yannas relocation standard, and how to document changes that strengthen your case.

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