Probate in Petroleum County, Montana: 2026 Guide

This guide is for educational purposes only and is not legal advice. Laws change frequently — verify current requirements with the Petroleum County probate court or an attorney.

Last updated: February 15, 2026

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Overview

Petroleum County is located in Montana with a population of approximately 500. The Petroleum County District Court (10th Judicial District) handles all probate and estate matters for decedents who were domiciled in the county at the time of death.

Montana probate is governed by Title 72 of the Montana Code Annotated (MCA). The process begins with filing a Petition for Probate of Will and Appointment of Personal Representative to admit the will and appoint a personal representative. The court then issues Letters Testamentary for testate estates or Letters of Administration for intestate estates.

For smaller estates, Montana offers a simplified procedure using an Affidavit for Collection of Personal Property if the value of the entire estate, less liens and encumbrances, does not exceed $100,000. This process requires a 30-day waiting period after death before the affidavit can be presented to holders of the decedent's property.

Montana law sets maximum statutory fees for personal representatives and attorneys based on the value of the estate (typically not to exceed 3% of the first $40,000 and 2% of the excess), though reasonable compensation is often allowed by the court.

This guide provides an informational overview of the Petroleum County probate process. It is not legal advice and is not a substitute for consulting a qualified attorney. Laws and local procedures may change — verify current requirements with the court.

Courthouse Information

Petroleum County District Court

Probate matters in Petroleum County are handled at the Petroleum County Courthouse.

Address: 302 East Main Street, Winnett, MT 59087

Mailing Address: PO Box 226, Winnett, MT 59087

Phone: (406) 429-5105 (Clerk of District Court)

The District Court is part of the 10th Judicial District of Montana. The Clerk of District Court's office is located within the county courthouse in Winnett.

Parking and Access

Street parking is generally available around the courthouse in Winnett. The building is accessible to the public during business hours.

Filing Process

Step 1: Determine If Probate Is Necessary

Before filing, assess whether formal probate is required:

  • Small Estate Affidavit: If the estate is valued at $100,000 or less (less liens), you may use an Affidavit for Collection of Personal Property after a 30-day waiting period.
  • Non-Probate Transfers: Assets with designated beneficiaries (POD/TOD accounts, life insurance) or held in joint tenancy with right of survivorship bypass probate.
  • Trust administration: Assets held in a living trust generally do not require probate.

Step 2: File the Petition

If formal probate is needed, file a Petition for Probate with the Petroleum County District Court. Include:

  • Original Will (if applicable)
  • Application for Informal Probate or Petition for Formal Probate
  • Certified Death Certificate
  • Filing fee ($100)
  • Proposed Order and Letters

E-filing may not be available for initial probate pleadings in all rural counties; check with the Clerk before filing.

Step 3: Provide Notice

After filing and appointment, you must:

  • Mail notice of the appointment to all heirs, devisees, and interested parties within 30 days.
  • Publish notice to creditors in a newspaper of general circulation in Petroleum County (such as the Winnett Times or Lewistown News-Argus) once a week for three successive weeks.

Step 4: Attend the Hearing

For informal probate, a hearing is often not required if the paperwork is in order. For formal probate, the court will schedule a hearing to validate the will and appoint the personal representative.

Step 5: Administer the Estate

After receiving Letters, the personal representative must:

  • Notify creditors (creditors have 4 months from the date of first publication to file claims).
  • Inventory and appraise all estate assets within 9 months of appointment.
  • Pay valid creditor claims and estate expenses.
  • File federal and state tax returns as needed.
  • Distribute assets to beneficiaries.
  • File a Statement to Close Estate or petition for a formal closing decree.

Local Requirements

Petroleum County-Specific Procedures

  • Filing Method: Paper filing is standard. Contact the Clerk at (406) 429-5105 to confirm if fax or email filing is accepted for subsequent documents.
  • Bond: Bond may be required unless waived by the will or by the court.
  • Local Rules: The 10th Judicial District rules apply.
  • Publication: Notice to creditors must be published in a newspaper of general circulation in the county, typically the Winnett Times or the Lewistown News-Argus.

Always verify specific local requirements with the Clerk of District Court.

Timeline & Fees

Filing Fees (Petroleum County)

  • Probate Commencement (Formal or Informal): approximately $100
  • Certified copies of Letters: approximately $2 per document plus copy fees
  • Publication costs: approximately $100-$200 depending on the newspaper
  • Recording fees: Varies by document length (for real estate transfers)

Montana law allows for reasonable compensation for attorneys and personal representatives, often calculated as a percentage of the estate value or an hourly rate.

Payment Methods

The court typically accepts cash, checks, or money orders. Credit cards may not be accepted or may incur a convenience fee.

Estimated Timelines

  • Simple estates (Informal): 6-12 months
  • Average estates: 9-18 months
  • Complex or contested estates: 18 months to 2+ years

The creditor claim period is 4 months from the first date of publication, which sets a minimum timeline for closing the estate.

Local Resources

Petroleum County Court Resources

  • State Bar of Montana: (406) 442-7660 — montanabar.org
  • Montana Legal Services Association: (800) 666-6899 — mtlsa.org

Publication

  • Winnett Times: Local community newspaper
  • Lewistown News-Argus: (406) 535-3401 — Regional newspaper often used for legal notices

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County Forms

Probate Forms (Statewide)

Official Montana Judicial Branch forms for wills, estate planning, and probate.

Affidavit for Collection of Personal Property

Form for small estates valued at $100,000 or less.

Frequently Asked Questions

Where do I file for probate in Petroleum County?
File with the Clerk of District Court at the Petroleum County Courthouse, 302 East Main Street, Winnett, MT 59087.
How much does probate cost in Petroleum County?
The initial filing fee is $100. Additional costs include publication fees ($100-$200) and fees for certified copies.
Can I avoid probate in Petroleum County with a small estate?
Yes, if the estate is valued at $100,000 or less (after liens), you can use the Affidavit for Collection of Personal Property after a 30-day waiting period.
How long does probate take in Petroleum County?
Simple estates typically take 6-12 months. The mandatory creditor claim period is 4 months.
Do I need an attorney for probate in Petroleum County?
Montana law does not strictly require an attorney for informal probate, but it is highly recommended, especially for formal probate or if real estate is involved. The Clerk of Court cannot provide legal advice.

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Informational guidance only — not legal advice

Disclaimer: This article is for informational purposes only and does not constitute legal advice. Probate laws and local court rules in Petroleum County, Montana may change without notice. Consult a qualified attorney for advice specific to your situation. SwiftProbate is not a law firm and does not provide legal representation.