Montana Guardianship vs Affidavit — Which Do You Need?

You're raising your grandchild in Montana and a well-meaning neighbor says you need to "get guardianship." Your sister-in-law says an affidavit is enough. They're both partly right — but which one fits your situation depends on facts specific to your family, not general advice.

What Each Path Actually Does

Caretaker relative affidavits (MCA 20-5-503 for school, MCA 40-6-502 for medical) let a blood, marriage, or adoption relative authorize school enrollment and routine health care without going to court. Only the relative signs — no parent signature required. The educational version runs through the end of the school year; the medical version expires after six months.

Minor power of attorney (MCA 72-5-103) requires a parent's or guardian's signature and lasts up to six months. It can delegate care, custody, or property powers to any adult, including non-relatives.

Court guardianship (MCA Title 72, Chapter 5, Part 2) is a formal judicial appointment. Unless limited by the court, the guardian holds powers and responsibilities comparable to a parent's. Under MCA 72-5-233, a guardian's authority and responsibility end upon the guardian's death, resignation, or removal, or upon the minor's death, adoption, marriage, or attainment of majority; a guardian's resignation must be approved by the court.

When Affidavits Are Enough

Affidavits work well when the arrangement is genuinely temporary and uncontested — a parent is in treatment, deployed, or dealing with a crisis, and you need to get the child enrolled in school and into a doctor's office without waiting for court dates. The paperwork costs nothing beyond a notary fee, takes an afternoon instead of months, and preserves the parent's legal rights.

Start with affidavits if the child arrived recently, the situation is expected to resolve, and no one is fighting over the child's placement. Both affidavits have statutory eligibility conditions: a parent must have left the child with no definite return time, the child must live with you full-time, and no adequate provision for the relevant care can exist. School enrollment under MCA 20-5-502 also requires that you cannot contact either parent or that a parent you can contact is unable or unwilling to regain custody; the medical affidavit requires that you cannot contact the parent or that the parent refuses a written request to regain custody.

When You Need Court Guardianship

The affidavit path hits a wall in several situations:

The child needs major medical care. Caretaker affidavits cover routine outpatient treatment — wellness visits, immunizations, dental cleanings, prescriptions. They do not authorize major surgery, inpatient psychiatric admission, or organ-related procedures. If the child's health needs go beyond routine care and no parent is available to consent, guardianship provides the broader authority.

You need a passport or federal documentation. For a child under 16, the U.S. Department of State generally requires both parents' or guardians' consent, or documents showing that both consents are not required. An informal caretaker affidavit alone does not replace the federal passport consent requirements.

The parent returns and demands the child back. If a parent voluntarily gave the child to a relative and the child remained there for at least six months while it was unclear whether or when the parent would return, the relative may file a Continuing Custody Affidavit under MCA 40-6-602. The relative may maintain temporary custody for five days after the parent's return and demand while completing the affidavit and waiting for the court's order. During that period, a court may order the child returned after the parent's petition and a hearing if it finds the six-month condition is unmet, the relative committed abuse or neglect, or the affidavit was not filed in good faith. Refusing to surrender custody is protected from civil or criminal action only when done in good faith and in compliance with the statute.

The arrangement is permanent. When you're not waiting for a parent to get back on their feet — the parent has died, parental rights are terminated, or the parent has no realistic plan to resume care — guardianship gives the child and the family the legal stability that temporary documents cannot.

Comparing the Paths

The Practical Middle Ground

Many Montana families start with affidavits and move to guardianship only if the situation persists. That progression is normal and expected. The affidavit gets the child into school and into the doctor's office this week. Guardianship comes later if the arrangement stabilizes into something long-term.

If you're unsure which path fits, the Montana Kinship Navigator Program (1-833-445-3395) offers free guidance, and the Montana Legal Services Association (1-800-666-6899) provides free legal help for income-eligible caregivers.

Our Montana School & Medical Consent guide walks you through every instrument in detail, including a decision flowchart that matches your family's circumstances to the right document.

See more Montana guides →