Suing on behalf of a family member is possible, but a court will not let you proceed until you have formal legal authority tied to that person’s situation: parental status or a guardianship appointment for a minor, guardianship or a power of attorney that covers litigation for an incapacitated adult, or letters from a probate court if the person has died. The right path depends on why your relative cannot bring the claim themselves, and choosing the wrong one can delay a valid case or lose it entirely.
Why Authority Comes Before Filing
Every plaintiff has to show a direct, personal stake in the case. Caring deeply about what happened to a relative does not, by itself, give you the right to sue. Courts recognize a narrow exception, sometimes called third-party standing, when the representative has a close relationship with the injured person and that person faces a genuine obstacle to suing on their own. A young child, a parent with advanced dementia, a spouse killed in a crash — each fits the pattern, but each requires a different mechanism to step into court.
Federal Rule of Civil Procedure 17(c) sets the framework for federal cases: a general guardian, conservator, or similar fiduciary can sue on behalf of a minor or incompetent person, and states have parallel rules.1Legal Information Institute. Federal Rules of Civil Procedure Rule 17 – Plaintiff and Defendant; Capacity; Public Officers Without one of those roles, or the probate equivalent when someone has died, a court will not recognize you as the right party to bring the suit.
Filing a Lawsuit for a Minor Child
Children under 18 cannot file their own lawsuits. A parent usually acts as the child’s litigation representative because parental authority already exists — no separate guardianship is needed. The parent decides whether to sue, which attorney to hire, and whether to accept a settlement offer. What the parent cannot do is treat any recovery as their own.
Any money awarded belongs to the child. Courts must approve settlements involving a minor, and judges look hard at whether the terms actually serve the child. The judge also reviews attorney fees. Approved funds typically go into a blocked bank account that no one can touch until the child turns 18, a structured settlement annuity that pays out over time, or a trust managed by a professional fiduciary. If the child has a disability, a special needs trust can preserve eligibility for Medicaid and SSI. Parents cannot simply deposit the money into a household account and promise to save it.
When a Parent Is Not Available
If no parent is available or willing to act, the court can appoint a guardian ad litem whose only job is to protect the child’s interests in that particular lawsuit. Rule 17(c) also allows a “next friend” to file when a child has no appointed guardian.1Legal Information Institute. Federal Rules of Civil Procedure Rule 17 – Plaintiff and Defendant; Capacity; Public Officers A next friend is not a formal guardian and not technically a party; they function as an agent of the court, making sure the child’s rights are protected.2Legal Information Institute. Next Friend A grandparent, aunt, or older sibling can serve, provided their interests do not conflict with the child’s.
A grandparent raising a child without formal legal status may need to petition for guardianship first, or ask the court for guardian ad litem status for the specific case.
Filing for an Incapacitated Adult
Adults who cannot manage their own legal affairs because of severe injury, dementia, stroke, or other cognitive impairment still have legal rights. Someone else just needs formal authority to exercise them. Two paths lead there.
Durable Power of Attorney
A durable power of attorney is signed while the person still has capacity and stays in force after they lose it. If your parent named you as agent under a durable POA before their condition worsened, you may already have the authority you need without going to court.
The document has to say so, though. A power of attorney limited to banking and property does not automatically authorize you to file a lawsuit. For litigation authority, the document typically has to grant that power explicitly. If it does not, guardianship is usually the next step. This gap is one of the most common planning oversights families discover after a crisis has already hit.
Guardianship or Conservatorship
If no valid POA covers litigation, a family member must petition a court to be appointed as guardian or conservator. Terminology varies by state — some use “guardian” for personal decisions and “conservator” for financial ones, others use the terms interchangeably.
Guardianship strips an adult of fundamental rights, so courts take the petition seriously. The person alleged to be incapacitated receives notice and has the right to attend the hearing, have their own attorney, and contest the appointment. Close relatives are also notified. The petitioner must present evidence of incapacity, often including medical testimony. Judges look for the least restrictive option that still protects the person, so an appointment may be limited to specific areas rather than sweeping authority.
Filing fees for guardianship petitions typically run a few hundred dollars, not counting attorney fees. The process takes weeks to months depending on the court’s calendar and whether anyone contests it. When a statute of limitations is about to expire, some courts allow emergency temporary appointments.
Bringing a Claim for a Deceased Relative
When a family member dies because of someone else’s negligence or wrongful act, two distinct claims may exist: a wrongful death action and a survival action. They sound similar, compensate different people for different losses, and in many states are filed by different parties.
Wrongful Death
A wrongful death claim compensates surviving family members for what they lost because of the death: financial support, companionship and guidance, funeral and burial costs, and the emotional anguish of losing a family member. The money goes to the beneficiaries, not through the estate.
Who can bring the claim depends on state law, but a general hierarchy applies. Spouses, domestic partners, and children typically have first priority. If there is no surviving spouse or child, the right often shifts to parents or other relatives under intestate succession rules. Some states also allow financially dependent stepchildren, putative spouses, or parents to bring claims if they can show they relied on the deceased for basic necessities. A personal representative or executor usually files on behalf of these beneficiaries.
Survival Actions
A survival action continues the lawsuit the deceased person would have brought if they had lived. It belongs to the estate, not the family. Damages cover the deceased’s own medical expenses from the injury, lost wages between the injury and death, and in many states, pain and suffering endured before death. Any recovery flows into the estate and is distributed to heirs through probate.
The distinction matters. If someone was injured, ran up months of medical bills, and then died, the survival action captures those pre-death losses while the wrongful death action captures the family’s ongoing losses. Families who pursue only one type of claim can leave significant money on the table.
Getting Authority Through Probate
To file for the estate, you need to be appointed as personal representative — executor or administrator — through probate court. If the deceased left a will naming an executor, that person petitions to validate the will and receive “letters testamentary,” the document that officially grants authority to act for the estate. If there is no will, the court appoints an administrator, usually the surviving spouse or nearest relative, and issues “letters of administration” carrying the same authority.
Either way, the process requires a petition, a death certificate, and a court appearance. Without those letters, no court will recognize your authority to act for the estate, no matter how close your relationship to the deceased.
Filing Deadlines and Tolling
Every claim has a statute of limitations. For wrongful death, the deadline ranges from one year in states like Kentucky and Tennessee to three years in roughly a third of states, with most landing at two years from the date of death.3Justia. Wrongful Death Lawsuits – 50-State Survey A few states allow longer when the death resulted from homicide or the cause of death was not immediately discoverable. For personal injury claims on behalf of a living plaintiff, the deadline is typically two to three years, though medical malpractice, product liability, and government claims often have shorter windows or special notice requirements.
Most states toll — pause — the statute of limitations for minors and mentally incapacitated plaintiffs. The clock does not start until the child turns 18 or the incapacitated person regains capacity. A child injured at age 5 may have until age 20 or 21 to file, depending on the state’s rules. Don’t rely on this as a strategy. Memories fade, evidence disappears, witnesses move. Filing sooner is almost always better.
Federal claims are a notable exception. Under the Federal Tort Claims Act, for example, the two-year deadline applies to minors without tolling. Treat any potential claim as time-sensitive and consult an attorney soon after the injury or death.
Conflicts of Interest
Courts pay close attention to whether the representative’s interests actually align with the person being represented. A parent suing on behalf of a child injured in a car accident where the parent was driving creates an obvious conflict. A guardian who stands to inherit from an incapacitated person’s estate may have incentives that do not match the person’s best interests.
When a conflict exists or looks likely, a court can refuse to appoint the family member, appoint a separate guardian ad litem, or require additional oversight of any settlement. Representatives owe a fiduciary duty to the person they represent, meaning they must put that person’s interests first. Violating that duty can result in removal, personal liability for losses, and in extreme cases, criminal charges. Acting as someone’s legal representative is not a ceremonial title; it comes with real obligations and real consequences when things go wrong.