Jurisdiction is the first and most important step. Before anything else is addressed, it is your priority to know whether a Swiss or a foreign court has jurisdiction over the divorce. This is not a mere formality: jurisdiction determines which procedural law applies, how long the proceedings will take, and—through the connection to the applicable law—how matrimonial property, pension rights equalization, and spousal support will ultimately be calculated.

For couples with ties to Switzerland and to an EU member State, the Lugano Convention (CLug) governs international jurisdiction in civil and commercial matters; for questions of jurisdiction in family law between Switzerland and other countries, the Swiss Private International Law Act (IPRG) as well as the relevant European regulations are also taken into account, to the extent that they apply at all in relation to Switzerland. In practice, we first examine several possible connecting factors: the habitual residence of both spouses, the last common habitual residence (provided one spouse still lives there), the habitual residence of the applicant under certain additional conditions, and the nationality of both spouses.

Geneva, as an international hub, presents its own unique challenges. The city is home to tens of thousands of diplomats and staff members of international organizations—a group we regularly represent. These cases raise additional questions: What immunities apply to the individual concerned or their employer? How does frequent professional mobility affect the determination of habitual residence? And what entitlements exist under the pension funds of international organizations, such as the United Nations Pension Fund? These questions influence both the determination of jurisdiction and subsequent pension and alimony issues. We take them into account from the very beginning.

If it is unclear whether a Swiss or a foreign court has jurisdiction, an early assessment is recommended—ideally before either party files a complaint. We address this preliminary issue in a structured manner so that our clients know where they stand before taking action.

Jurisdiction and applicable law are two distinct issues. A Swiss court may have jurisdiction but still be required—depending on the connecting factors—to apply foreign law, and vice versa. In Switzerland, the Federal Act on Private International Law (LDIP) governs which law applies to a divorce with an international element; as a rule, the determination is based on the couple’s common residence or, alternatively, their common nationality. The law of other countries follow their own rules for determining the applicable divorce law.

In practice, this means that even if a Swiss court is presiding over the proceedings, foreign law may apply to certain aspects—and vice versa. This is particularly evident in matters of matrimonial property law and the division of pension rights, which are governed by distinct and very different rules in several countries (see Chapters 4 and 6). We assess separately for each client which law applies to which specific aspect of the divorce and tailor our procedural strategy accordingly.

A choice-of-law provision in a prenuptial agreement can alter this legal connection. If a prenuptial agreement contains a choice-of-law clause, it needs be assessed whether it was validly agreed upon under the applicable rules and whether it also applies to the consequences of the divorce—not just to matrimonial property law in the narrow sense. In international cases, it may be beneficial to include such clauses in a prenuptial agreement before the marriage takes place; if a marriage has already been entered into without such a provision, we examine what options are still available.

Switzerland uses its own system to rule on the division of assets in divorce—with financial consequences that can sometimes be significant. The standard matrimonial property regime in Switzerland is the participation in accrued gains: each spouse retains their separate property (in particular, assets acquired before the marriage, as well as inheritances and gifts), while the accrued gains earned during the marriage are divided equally upon divorce. In contrast, other countries use the equalization of accrued gains system: the assets at the time of marriage are compared with the assets at the time the divorce petition is filed; the difference—the accrued gains—is equalized.

These systems do not necessarily lead to the same result. Increases in the value of assets that already existed at the time of marriage are treated differently depending on the applicable law; the methods used to value business interests, real estate, or corporations also differ. For clients with international assets—such as those holding interests in offshore company structures or assets in multiple countries—the choice of applicable matrimonial property law can make a significant financial difference. We work closely with our network of specialized wealth planners to accurately identify and value assets.

The systems also differ with regard to spousal support. In international cases, the additional question arises as to which law applies to the calculation. In Switzerland, post-marital alimony is governed by Art. 125 of the Swiss Civil Code (CC) and is determined on a case-by-case basis based on the duration of the marriage, the standard of living during the marriage, and the ability of both spouses to become financially independent again. Child support is governed by its own rules, which are guided by the best interests of the child, and is payable regardless of how parental responsibility is divided between the parents.

If one parent or spouse lives abroad while the proceedings are taking place in Geneva—or vice versa—we clarify in advance which law applies to the maintenance calculation. Through our network of partner law firms in more than 80 countries, we also ensure that a maintenance order issued in Switzerland remains enforceable abroad, and vice versa.

Another topic in cross-border situations is the tax treatment of maintenance payments—such as deductibility on one side and tax liability on the other —is an issue we clarify together with specialized tax advisors from our network, as different scenarios may arise depending on the country of residence of the recipient and the payer.

Joint parental custody has been the norm in Switzerland since 2014—and this generally does not change as a result of a divorce involving foreign elements. The key factors are the practical arrangements for custody and the care model, as well as the provisions governing personal contact. In international cases, an additional issue arises that is particularly prone to conflict in practice: whether, and under what conditions, one parent may relocate abroad with the child.

A move abroad with the child generally requires the consent of the other parent with custody or court approval. This applies regardless of whether the move is to Europe, Switzerland, or a third country. The child’s best interests are always the deciding factor: the competent court examines, in particular, the impact on the child’s relationship with the other parent, the child’s educational and social situation, and the motives of the parent seeking to relocate. We carefully prepare such applications—both when our clients themselves wish to relocate and when they are opposing such a move.

Furthermore, for matters involving Switzerland and a good number of foreign jurisdictions, the rules of the 1996 Hague Convention on the Protection of Children apply, which governs international jurisdiction over child-related matters as well as the recognition of relevant decisions between the two countries. In cases of the wrongful removal of a child abroad—for example, when a parent takes the child without consent—the 1980 Hague Convention on Child Abduction also applies; for these particularly urgent situations, we refer you to our in-depth chapter on this topic.

A divorce decree is only fully effective once it is recognized in the all relevant countries and, if necessary, can be enforced there. The enforcement of maintenance orders is particularly relevant in practice when the person obligated to pay does not do so voluntarily. Through our partner network in more than 80 countries, we ensure that a Swiss maintenance order remains enforceable abroad—for example, through the local debt collection or enforcement proceedings—and that, conversely, a foreign judgment is recognized and enforced in Switzerland. The division of pension assets (see Chapter 6) also frequently requires separate implementation with the respective foreign pension fund.

For a more detailed discussion of recognition and enforcement issues, please refer to our situation pages on this topic within the “Proceedings abroad” section.

The following anonymized case descriptions illustrate typical scenarios from our practice. They are not a substitute for individual consultation.

Case scenario 1 – Relocation from Norway to Geneva. A Norwegian married couple relocates their joint residence to Geneva; several years later, one spouse is considering divorce. Here, we first determine whether Switzerland has jurisdiction based on the current habitual residence, whether the Norwegian extended limited tax liability still applies to one of the spouses, and how this affects any potential equalization payment. It is often necessary to additionally examine whether Norwegian pension assets (such as those from previous employment in Norway) are still available, because they may be settled separately from the Swiss occupational pension plan.

Case scenario 2 – Employees of an international organization. A wife works for an international organization in Geneva, while her husband continues to live in the US. In this case, we primarily examine which immunities apply to the organization and its employees, how these affect service of process and jurisdiction, and what claims against the organization’s pension fund actually exist and are enforceable in the event of a divorce—a question that falls outside the direct scope of both Swiss and US pension law.

Case scenario 3 – Entrepreneurial couple with business interests in both countries. A married couple holds business interests in both Switzerland and France; one spouse wishes to file for divorce. The focus here is on the valuation of the equity interests, which, depending on the applicable matrimonial property regime, is conducted as of different reference dates and using different methods. We work closely with specialized wealth planners and tax advisors to develop a robust, legally sound valuation while also taking into account the tax implications of a transfer of shares.

Case scenario 4 – Joint children; one parent wishes to move back to Russia. Following the separation, one parent wishes to move back to Russia from Switzerland with the joint children, while the other parent does not agree. Depending on which parent we represent, we either prepare the application for court approval of the change of residence or challenge an unauthorized move, taking into account the Hague Convention on the Protection of Children and paying particular attention to maintaining continuity in the relationship with the parent remaining in Switzerland.

In our practice, certain mistakes keep recurring in divorce cases involving Switzerland and foreign jurisdictions:

• Failing to clarify jurisdiction in a timely manner. Initiating proceedings without verifying whether a Swiss or a foreign court has jurisdiction increases the risk of having the case heard in a less favorable jurisdiction—with consequences for matrimonial property law, pension rights equalization, and spousal support.
• Confusing matrimonial property law with occupational pension rights. The division of accrued gains (or equalization of accrued gains) on the one hand, and the division of occupational pension rights on the other, are often conflated, even though they are two separate pools of assets that must be treated according to their own rules.
• Ill-considered communication before initiating proceedings. Particularly in cases involving international assets, a premature announcement of the intention to divorce can lead to assets being transferred or concealed before protective measures can take effect.
• Failure to account for pension assets held by international organizations. For employees of international organizations, the entitlement to the respective pension fund is regularly overlooked or misclassified because it is not directly subject to either Swiss or foreign pension law.
• Unilateral relocation with the child. Moving abroad without the consent of the other parent or court approval can trigger civil and international return proceedings, even if the relocating parent acts in good faith.
• Failing to seek early legal advice due to cost concerns. Particularly in international cases, an early and precise clarification of the initial situation is often more cost-effective than correcting disadvantages that have already arisen at a later stage.

We support our clients from the very beginning to ensure that these mistakes do not occur in the first place.