Aunt, Uncle, or Sibling Guardianship in Massachusetts

Guardianship Isn't Just for Grandparents

When people think of kinship care, they picture grandparents. But aunts, uncles, adult siblings, cousins, and stepparents are often the ones who actually step in — sometimes overnight — when a parent can't care for a child.

Massachusetts law doesn't limit minor guardianship to grandparents. Under M.G.L. c. 190B, § 5-206, any person interested in the minor's welfare may petition; under § 5-207, the court may appoint any person whose appointment is in the minor's best interest. Your relationship to the child matters for the court's evaluation, but there's no statutory requirement that you be a grandparent or even a blood relative.

Who Can File

You can petition for guardianship of a niece, nephew, younger sibling, cousin, or stepchild if:

• You're a person interested in the child's welfare; a minor age 14 or older may also petition
• The court has jurisdiction under M.G.L. c. 209B. One common basis is that, immediately before filing, the child lived in Massachusetts with a parent or person acting as a parent for at least six consecutive months, counting temporary absences (or from birth if the child is under six months old). If no other state would have jurisdiction under § 2(a)(1), § 2(a)(2) may allow jurisdiction when the child and a parent or another contestant have significant connections to Massachusetts and substantial evidence about the child's care is available here. Emergency jurisdiction may apply if the child is physically present in Massachusetts and has been abandoned, needs emergency protection, or for other good cause shown; if another state would otherwise have jurisdiction, Massachusetts may issue only temporary orders unless that state declines, stays, or defers.
• You can demonstrate that the child needs a guardian and that you're suitable to serve

The petition process is identical regardless of your specific relationship to the child. You file form MPC 140, serve notice on all required interested parties, undergo background screening, and attend a hearing.

Relationship-Specific Considerations

Aunts and uncles: As a sibling of the child's parent, you may have direct knowledge of the parent's circumstances — substance use, incarceration, mental health crisis. This can help the court understand why guardianship is needed. If your sibling (the parent) consents, the process is significantly simpler.

Adult siblings: An older sibling seeking guardianship of a younger one is common when both parents are absent. The court evaluates your maturity, stability, and ability to provide for the child's needs. Age alone doesn't disqualify you, but the judge will look closely at your living situation and financial stability.

Stepparents: If you're not legally married to the child's parent, you have no automatic legal relationship to the child. Guardianship through MPC 140 is one path. If you've been living with and co-parenting the child with the legal parent's consent, you may also qualify for de facto parent status under M.G.L. c. 209C, § 25 (the Massachusetts Parentage Act, effective January 1, 2025). The current statutory test generally requires the shorter of three years or 40 percent of the child's life in the same household, but at least two years, plus other elements proved by clear and convincing evidence; the court may accept a shorter period only in extraordinary circumstances for good cause.

Cousins: First cousins and first cousins once removed are recognized as qualifying relatives for TAFDC child-only grants under 106 CMR 703.310(A)(1)(a), but guardianship eligibility doesn't depend on the degree of relation. Even a family friend with no blood relationship can petition.

The Non-Court Alternatives

If the child's parent is cooperating, you may not need guardianship at all:

• Caregiver Authorization Affidavit (M.G.L. c. 201F) — A parent, legal guardian, or legal custodian delegates educational and healthcare decision-making authority to you. No court filing is needed. The affidavit lasts up to two years; a notary may charge a fee. The authorizing party signs before two adult witnesses and a notary, and the caregiver signs an acknowledgment.
• Temporary Agent Authorization (§ 5-103) — A parent or guardian may delegate care, custody, and property powers for up to 60 days by a signed writing attested by two adult witnesses (neither the agent), with the agent's written acceptance. A parent cannot appoint an agent over another known, willing, and able parent without that parent's written consent, or if a court has placed the child in someone else's custody.

These are practical options when an aunt or uncle is caring for a niece or nephew temporarily — a parent's work travel, a short hospitalization, a family arrangement that just needs documentation.

If no existing appointment or delegation applies and no parent or legal guardian can authorize another arrangement, petitioning for court-appointed guardianship is the route to court-backed authority.

Practical Tips for Non-Grandparent Petitioners

Document your caregiving history. The court wants to see that you've been involved in the child's life. School pickup records, medical appointment attendance, financial support — anything showing a sustained caregiving role strengthens your petition.

Address the "why not the other parent" question. If one parent is the reason for the guardianship (incarceration, addiction, death), the court will ask about the other parent. Be prepared to explain whether the other parent is involved, consenting, or unable to care for the child.

Consider the child's existing connections. Courts favor placements that minimize disruption. If the child has been living with you, attending school in your area, and is bonded with your household, that continuity weighs in your favor.

Budget for service costs. The MPC 140 filing fee is $0, but sheriff service costs and potential publication fees apply. Low-income petitioners can request fee waivers through the Affidavit of Indigency.

Free Resources

Massachusetts Court Service Centers help any petitioner — not just grandparents — with form preparation and procedural guidance at no cost. The Kinship Navigator program and MassLegalHelp also serve all relative caregivers, and legal aid organizations may provide representation to eligible low-income families.

Our Massachusetts Guardianship and Custody Court Process Guide covers the guardianship process for all relative caregivers — aunts, uncles, siblings, stepparents, and grandparents — from initial filing through the hearing and post-appointment duties.

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