1. Introduction
This decision concerns whether an advanced Scottish divorce action should be sisted—temporarily stayed—in favour of matrimonial proceedings in California. Although the marriage and family had a substantially stronger historical connection with California than with Scotland, the Court of Session refused the defender’s motion.
The decision establishes an important practical application of paragraph 9 of Schedule 3 to the Domicile and Matrimonial Proceedings Act 1973. A foreign jurisdiction’s stronger overall connection with a marriage is not conclusive. The court must assess fairness and convenience at the time the sist is sought, including the maturity of the Scottish action, the nature and certainty of the foreign proceedings, likely delay, duplicated expense and the practical availability of timely relief.
The pursuer, a German national living and working as a medical consultant in Scotland, sought divorce and financial provision in the Court of Session. The defender, a dual UK and US citizen living in California with the parties’ three children, sought a sist pending Californian legal-separation proceedings which he intended later to convert into divorce proceedings.
2. Background and Procedural History
- The parties married in Las Vegas in January 2006 and lived mainly in California.
- They and their three children relocated to Scotland during 2024 and separated in December of that year.
- Following separate contested proceedings, the defender and children returned to California in May 2026.
- An earlier Scottish divorce action was dismissed after the defender disputed the jurisdictional basis relied upon.
- The present action was served in November 2025. A four-day proof was fixed in March 2026 to begin on 13 October 2026.
- The defender commenced Californian legal-separation proceedings in July 2026 and moved to sist the Scottish action shortly afterwards.
- At the date of the sist hearing, the defender had not yet met California’s residence requirement for divorce. He expected to do so on 27 November 2026.
The defender accepted that the Court of Session had jurisdiction on the basis of the pursuer’s habitual residence in Scotland for the year preceding the action.
3. The Legal Issue
The central question was whether the balance of fairness and convenience made it appropriate to suspend the Scottish action until the Californian proceedings had been disposed of.
The defender relied on both paragraph 9 of Schedule 3 to the 1973 Act and the common-law doctrine of forum non conveniens. The pursuer questioned whether the common-law doctrine applied where the Scottish case sought divorce but the Californian case sought only legal separation. Lady Tait did not decide that point because the motion could be determined under the 1973 Act, informed by the established common-law authorities.
4. Statutory Framework
Paragraph 9 permits the court to sist a Scottish consistorial action where:
- other proceedings concerning the marriage, or capable of affecting its validity, are continuing in another jurisdiction; and
- the balance of fairness, including convenience, makes it appropriate that the foreign proceedings be disposed of first.
Paragraph 9(2) expressly requires consideration of all relevant factors, including witness convenience and any delay or expense resulting from granting or refusing the sist.
The court held that Californian legal-separation proceedings were “other proceedings in respect of the marriage” for the purposes of paragraph 9(1)(a). The defender therefore crossed the statutory threshold. The application failed, however, under the separate fairness-and-convenience requirement in paragraph 9(1)(b).
5. Summary of the Judgment
Lady Tait refused the motion to sist and reserved the question of expenses. Her principal findings were:
- California had the greater historical and overall connection with the marriage.
- The children’s current residence in California carried reduced weight because their care arrangements had already been determined in separate proceedings.
- The Californian proceedings were nascent and uncertain: they sought legal separation rather than divorce, required the pursuer’s consent for a final legal-separation judgment, and faced possible jurisdictional and procedural challenges.
- The Scottish action was at a very advanced stage, with extensive disclosure completed and proof due within weeks.
- A sist would deprive the pursuer of a timely determination, duplicate work already undertaken and create considerable additional expense for both parties.
- The existence of assets outside Scotland did not make Scotland an unsuitable forum. Scottish courts commonly determine disputes involving foreign assets.
- The defender’s self-represented status, childcare obligations and practical inconvenience did not outweigh the delay and prejudice that a sist would cause.
6. Precedents Cited
This authority supports applying the common-law forum analysis when deciding a discretionary sist under the 1973 Act. It also establishes that the court should not ordinarily refuse a stay merely because the domestic claimant would lose a legitimate personal or juridical advantage, provided substantial justice can be obtained in the more appropriate foreign forum.
Lady Tait accepted that principle but emphasised its converse: a sist should not be granted merely to enable another party to obtain a juridical advantage where substantial justice, viewed practically, would not be served or where the overall balance of fairness points against a stay.
Mitchell v Mitchell 1992 SC 372
Mitchell v Mitchell 1992 SC 372 directs the court initially to consider the marriage’s overall connection with the competing jurisdictions. If the connection is prima facie with Scotland, a sist ordinarily requires other circumstances showing that justice demands it.
The present case demonstrates that the converse is not automatic. Even though the marriage was more closely connected with California, that fact did not itself require a sist. Procedural maturity, delay and practical fairness remained decisive. The court also distinguished the observation in Mitchell v Mitchell 1992 SC 372 that little weight should be given to which action was started first where both actions remain at an early stage: here the Scottish action was not at an early stage.
The parties framed their submissions around the familiar two-stage test:
- The defender must identify another available forum of competent jurisdiction that is clearly more appropriate for the interests of the parties and the ends of justice.
- If that burden is met, the pursuer must show special circumstances making it necessary for justice that the case nevertheless remain in Scotland.
The defender failed to establish that California was presently the clearly more appropriate forum. Its proceedings did not yet offer the same immediate remedy, and their future conversion into divorce proceedings remained uncertain.
Adun v Adun [2026] CSOH 23
The defender relied on this decision for the proposition that a sist could later be recalled if the foreign proceedings failed. Although that safeguard was available, it did not answer the immediate prejudice caused by postponing a Scottish proof that was ready to proceed. The possibility of later recalling a sist was therefore not sufficient to overcome the likely delay, duplication and cost.
In re Marriage of Patel (2025) 117 Cal.App.5th 262
This Californian appellate authority was relied upon in connection with California Family Code section 2345, under which a judgment of legal separation cannot be granted without both parties’ consent. Because the pursuer did not consent and intended to seek dismissal, the decision reinforced the uncertainty surrounding the Californian proceedings.
7. Analysis of the Court’s Legal Reasoning
7.1 Foreign legal-separation proceedings satisfy the statutory gateway
The judgment gives “proceedings in respect of the marriage” a broad meaning. The foreign case did not have to seek precisely the same remedy as the Scottish action. Californian legal-separation proceedings were enough to engage paragraph 9(1)(a), even though the Scottish action sought divorce.
This does not mean that a mismatch in remedies is irrelevant. It remains highly material under paragraph 9(1)(b), particularly where the foreign proceedings cannot presently provide the remedy sought in Scotland.
7.2 The centre of gravity was important but not determinative
The court accepted that California was the family’s principal historical centre: the parties had lived there for most of the marriage, the children were born there, the defender and children were living there, and significant assets and records were located there.
Nevertheless, the statutory test is not a mechanical count of geographical connecting factors. It requires a current and practical assessment of fairness. By September 2026, the Scottish litigation had developed its own strong procedural connection: pleadings, disclosure, expert preparation and a proof diet were already in place.
7.3 Delay and procedural uncertainty were decisive
The Californian case was for legal separation, not divorce. A final legal-separation judgment required consent which the pursuer refused to provide. Conversion to divorce depended on the defender later satisfying California’s residence requirement and successfully amending the proceedings. The pursuer also intended to bring jurisdictional and procedural challenges.
By contrast, the Scottish court was positioned to determine divorce and financial provision within months. A sist would likely postpone resolution into 2027 or 2028. Paragraph 9(2) made that delay directly relevant.
7.4 Litigation already undertaken could not be disregarded
The pursuer had lodged eight inventories containing 222 productions and had incurred substantial legal expense. The defender had participated in the action and in opposed procedural hearings. Moving the dispute to California would inevitably duplicate substantial work.
The judgment therefore indicates that timing is not merely procedural. A late sist application may materially alter the balance of justice, even where the foreign jurisdiction otherwise has stronger factual links.
7.5 Foreign assets did not render Scotland inappropriate
Significant assets were located in California, but two heritable properties were in England. Neither Scotland nor California had territorial control over the entire estate. Lady Tait noted that the Court of Session regularly addresses foreign assets and that difficulties concerning disclosure or recovery of Californian documents would principally fall upon the pursuer.
The location of property remains relevant, especially to enforcement, but it is not decisive where the domestic court can adjudicate the parties’ financial claims and the competing foreign court would itself face cross-border issues.
7.6 Practical justice was assessed for both parties
The defender’s lack of Scottish representation, residence in California and sole daily care of three children were genuine considerations. The court nevertheless observed that he had represented himself ably in several proceedings and appeared able to obtain legal assistance when required in California.
Against those burdens stood the pursuer’s anticipated loss of a prompt remedy, her existing legal indebtedness, the prospect of duplicated costs and her allegations of asset dissipation and failure to account. The court did not decide those allegations, but it was entitled to take the asserted urgency into account.
8. Complex Concepts Simplified
- Sist
- A temporary suspension of court proceedings. It does not dismiss the case and can later be recalled.
- Forum non conveniens
- The doctrine allowing a court to decline or pause proceedings because another available court is clearly more suitable for deciding the dispute.
- Lis alibi pendens
- A situation in which related litigation between the parties is already pending in another jurisdiction.
- Proof
- The Scottish civil-law equivalent of a trial at which evidence is heard and disputed facts are determined.
- Consistorial action
- An action relating to marital status, including divorce and separation.
- Habitual residence
- The place where a person has established the stable centre of their life; it can provide a jurisdictional basis for matrimonial proceedings.
- Juridical advantage
- A legal or procedural benefit available in one jurisdiction but not another, such as a more favourable financial regime.
- Heritable and moveable property
- Heritable property generally means land and buildings. Moveable property includes money, investments and most other assets.
9. Impact and Significance
The decision is likely to influence future cross-border matrimonial cases in several ways:
- Legal separation is sufficient to engage paragraph 9: foreign proceedings need not seek precisely the same matrimonial remedy.
- A stronger foreign connection is not decisive: the court must consider the practical position when the motion is decided.
- Late sist motions face greater difficulty: completed disclosure, fixed proof dates and substantial incurred expense can outweigh foreign connecting factors.
- The foreign remedy must be realistically available: proposed amendments, unmet residence requirements and likely procedural challenges may undermine claims that the foreign forum is clearly more appropriate.
- Foreign assets do not automatically dictate forum: cross-border enforcement and evidence are factors, not automatic bars to Scottish adjudication.
- Children’s residence may carry limited weight: where child-care issues have already been determined and are not part of the divorce action, their location is less influential.
The ruling remains a fact-sensitive Outer House decision. It does not establish that California is generally an inappropriate forum, nor that Scottish proceedings should always prevail once a proof has been fixed. Its central lesson is that the statutory balance is dynamic and must reflect actual procedural consequences rather than geographical connection alone.
10. Matters Not Decided
- The court did not determine whether common-law forum non conveniens applies where the Scottish and foreign proceedings seek different remedies.
- It did not resolve the parties’ disputed allegations concerning financial irregularities or dissipation of assets.
- It did not decide which jurisdiction’s financial regime would produce the preferable outcome.
- It did not hold that substantial justice could never be obtained in California.
The opinion contains one apparent reference to 27 November 2027, but the surrounding chronology and repeated references identify 27 November 2026 as the date on which the defender expected to satisfy California’s divorce-residence requirement.
11. Conclusion
NS against PSC confirms that paragraph 9 of Schedule 3 to the Domicile and Matrimonial Proceedings Act 1973 demands a practical, present-focused assessment of justice. California’s stronger connection with the marriage could not overcome the uncertainty of its legal-separation proceedings, the absence of an immediately available divorce remedy, and the substantial delay, duplication and expense that a sist would cause.
The key principle is that the geographical centre of a marriage does not displace an advanced Scottish divorce action where the proposed foreign process is materially less certain and waiting for it would produce procedural and financial unfairness.