I. Key Takeaways at a Glance

• No direct appeal in Switzerland: A party served with judicial documents via cross-border legal assistance cannot appeal the Central Authority's decision to grant service, nor can it demand the issuance of a formal, appealable decision (consideration 2.1.3).
• Parties lack standing in the legal assistance procedure: Litigants in the main proceedings on the merits do not have party status in the cross-border service process carried out between the requesting and requested states (consideration 2.1.3).
• Objections must be brought in main proceedings: Parties must assert any deficiencies of service exclusively before the court conducting the main proceedings on the merits (consideration 2.1.3).
• Practical risks remain high: Although Central Authorities examine the requirements of a mutual legal assistance request ex officio (consideration 2.1.2.4), their depth of scrutiny varies in practice, and deficiencies of service are not uncommon.
• Immediate preservation of records required: Recipients may be confronted with de facto service, the validity of which remains uncertain. Recipients should therefore immediately preserve all packaging, delivery receipts, track-and-trace records, and accompanying documentation, and consult counsel without delay.

II. Background and Procedural Context

The FSC case concerned an appellant seeking to challenge service executed through international mutual legal assistance under the Hague Service Convention. The appellant argued that the Central Authority must render an appealable decision granting the requested service. The FSC declared the appeal inadmissible (Nichteintreten), referring the appellant exclusively to the forum of the main proceedings.

III. Findings of the Federal Supreme Court

1. No direct appeal in Switzerland

Contrary to scholarly consensus in Switzerland and Germany, the FSC explicitly concluded that recipients of judicial documents cannot challenge the decision of the Central Authority to grant or deny international service (consideration 2.1.3). The Court clarified that the Hague Service Convention facilitates efficient judicial cooperation between states, rather than establishing a domestic, two-tier appellate structure for intermediate procedural steps (consideration 2.1.2.4).

2. No Party Status in Legal Assistance Proceedings

The FSC ruled that the parties to the underlying litigation are not parties to the cross-border service process carried out in this context (consideration 2.1.3). The interaction relating to service remains an intergovernmental administrative process between the judicial authorities of the requesting state and of the requested state. Because the recipient of service does not hold formal party status in this process, it has no right to request an appealable decision.

3. Ex Officio Review

The Central Authority must examine ex officio whether the request satisfies all formal prerequisites before service is executed. However, the served party cannot block or challenge the decision to execute service in Switzerland; it must raise all defenses regarding improper service, lack of notice, or due process violations directly before the court in which the main proceedings on the merits are pending (considerations 2.1.2.4 and 2.1.3).

IV. Practical Implications and Recommendations

The FSC's decision resolves an unsettled procedural question, but shifts substantial procedural risk onto recipients of service domiciled in Switzerland:

• Varying review standards across Central Authorities: Although Central Authorities must check formal requirements ex officio, their depth of review varies across cantonal and federal authorities. Recipients frequently encounter deficient service, including missing translations, incomplete forms, or uncertified annexes.
• The dilemma of de facto service: A recipient who physically accepts delivery is confronted with de facto service, leaving the legal validity and procedural consequences of any deficiencies unresolved under Swiss law. Because Swiss authorities will not rule on the validity of service, recipients cannot obtain immediate legal certainty.
• Meticulous evidence preservation: Because parties must litigate all challenges in the main proceedings, recipients should preserve all evidence of physical and digital delivery evidence. This includes envelopes with postmarks, stamps, tracking barcodes, delivery slips, signatures, date stamps, and accompanying cover letters.
• Prompt consultation of counsel: Parties involved in cross-border litigation must not stay passive in relation to communications or deliveries from Central Authorities; they must anticipate and address potential risks proactively. Upon receiving any cross-border judicial document, recipients should immediately instruct counsel to evaluate whether service triggers appearance deadlines, default risks, or procedural forfeiture.