The Montana Supreme Court has upheld a legal separation ruling in the case of In Re the Marriage of Michelle L. Dilsaver and Gregory C. Dilsaver. The court's decision, filed on November 4, 2026, affects the couple's property division and parenting arrangements following their separation. This ruling is significant as it clarifies procedural requirements for responding to legal actions in family law cases.

Gregory Dilsaver, who represented himself in the appeal, challenged the findings of the Twentieth Judicial District Court in Lake County. He claimed that the court erred by not considering his answer to the Petition for Legal Separation and by failing to notify him of the hearing. The court's ruling affirms the lower court's decisions, emphasizing the importance of adhering to procedural rules in legal matters.

The dispute began when Michelle Dilsaver filed a Petition for Legal Separation on June 6, 2025. She attempted to serve Gregory at an address he provided, but her efforts were unsuccessful. Consequently, Michelle served Gregory by publication, which led to his default when he failed to respond within the required time frame. The District Court held a hearing on October 16, 2025, where it granted Michelle a decree of legal separation, approved her proposed parenting plan, and equitably divided the couple's property and debts.

During the hearing, Michelle testified about the serious marital discord and the need for a legal separation. The court took judicial notice of a Permanent Order of Protection that had been issued in favor of Michelle against Gregory. The court found that it was in the best interests of the couple's eight minor children for them to reside solely with Michelle, with any contact between Gregory and the children to be supervised.

In its ruling, the Montana Supreme Court addressed Gregory's claims regarding the District Court's actions. The court noted that Gregory had not filed a timely response to the Petition for Legal Separation and that his attempts to answer were made after the default had already been entered. The court stated, "To require a district court to consider an untimely, unfiled, fee-deficient document tendered after default would undermine the structure and purpose of the Montana Rules of Civil Procedure."

The Supreme Court, led by Justice Ingrid Gustafson, affirmed the District Court's decisions, emphasizing that Gregory was not entitled to notice of the hearing since he was in default. The court explained that once a party is defaulted, they do not receive notice of subsequent proceedings unless they have appeared in the case. Gregory's claims of due process violations were rejected as the court found that he had been properly notified of the initial proceedings through publication.

This ruling has implications for how legal separations and divorces are handled in Montana, particularly regarding the importance of timely responses to legal actions. The decision reinforces the necessity for parties to adhere to procedural rules to ensure their rights are protected in family law cases.

Moving forward, the ruling sets a clear precedent that individuals who fail to respond to legal petitions in a timely manner may lose their opportunity to contest the proceedings. The court's affirmation of the lower court's ruling highlights the importance of following legal procedures, which can significantly impact the outcome of family law disputes.

As for what’s next, Gregory Dilsaver has the option to appeal the decision further, but details regarding any potential appeal were not available in the court filing. The case, docket number DA 25-0807, serves as a reminder of the critical nature of legal representation and the consequences of failing to engage with the legal process appropriately.