Lis pendens with different parties: when the state court may continue

Lis pendens under section 584(3) ZPO requires the parties and the subject matter of the state-court claim to match those of the pending arbitration. Necessary joinder may require a claim to be decided with several parties. It does not automatically make a person who is not named in the request for arbitration a party to that arbitration.

In 8 Ob 119/25w of 24 June 2026, the Austrian Supreme Court clarified this boundary. The state-court claim was brought against a member, while the arbitration concerned the cooperative. The lis pendens objection therefore failed because the parties were not identical.

Three questions should be kept separate in practice: Who is a party to the arbitration, what claim is pending there and what independent effect does the arbitration clause have? Only then can it be assessed whether the state-court proceedings must be dismissed or may continue.

What lis pendens means under section 584(3) ZPO

Section 584(3) ZPO prevents the same claim from being litigated at the same time in a pending arbitration and in another proceeding before a state court or another arbitral tribunal. If a further claim is brought for the same subject matter, it must be dismissed. The provision protects the parties from parallel decisions on the same dispute.

The rule differs from section 584(1) ZPO. Subsection 1 concerns the state court's jurisdiction where the matter is covered by an arbitration agreement and the defendant raises the objection in time. Subsection 3 presupposes an arbitration that is already pending over the same claim.

The page on reviewing an arbitration clause therefore answers a different preliminary question. A contract may contain an arbitration agreement even where the state-court claim is not subject to lis pendens because the parties or claim do not match.

Why party identity is decisive

According to 8 Ob 119/25w, the parties in the state-court proceedings and the arbitration must match. The actual procedural status is decisive. The review must focus on who appears as a party in the request for arbitration and against whom the claim is brought there.

Another person may be economically affected, use the same contractual structure or be indirectly affected by the decision. Those circumstances do not replace the formal and substantive review of party status. A common legal representative also does not create an additional party by itself.

Intervention requires care as well. An intervenor supports a party. That does not automatically turn the intervenor into the claimant or respondent. For lis pendens, the decisive issue remains whether that person became a party to the arbitration.

Necessary joinder does not add a party automatically

Necessary joinder concerns the people who must be involved for a decision to take effect uniformly. It may be important for the admissibility or merits of a claim. It does not mean that a person missing from the request for arbitration becomes a party without a further procedural step.

The Supreme Court draws the distinction clearly: lis pendens depends on who may be a party to the arbitration, not on who should have been a party. Necessary joinder therefore does not bring a third person into the arbitration by operation of law. In the state-court proceedings, the absence of a necessary party may have a different procedural consequence.

Under certain conditions, a third person may be joined as a party in arbitration on the basis of party autonomy and procedural autonomy. Section 594 ZPO provides the relevant framework. The joinder must have occurred and be documented in the particular case. An assumption is insufficient.

The identity of the subject matter needs its own review

The subject matter must be identical in addition to the parties. It is insufficient that both proceedings concern the same project, cooperative or resolutions. The specific relief sought, the legal claim and the facts relied upon must be compared.

Two proceedings may involve the same parties and still concern different subject matter. A proceeding about the validity of an acquisition of shares differs from a damages claim or from an action challenging another resolution. An economic connection alone does not establish lis pendens.

The existing article on multi-party arbitration and who is bound deals with the parties bound by an arbitration clause. Section 584(3) ZPO additionally requires a comparison of the claims that are already pending.

Consequences for the state-court proceedings

Once the parties and claim have been identified, the state court must examine the procedural status and the objections raised. If lis pendens exists, the further proceedings over the same claim may not continue. If the parties are different, 8 Ob 119/25w shows that section 584(3) ZPO does not apply for that reason alone.

This does not automatically establish state-court jurisdiction in every case. The arbitration clause may trigger an independent objection under section 584(1) ZPO. The specific matter must fall within the wording and scope of the agreement. The two examinations belong in separate steps of the argument.

When a state-court claim is brought despite an arbitration clause, the respondent should distinguish the objection to jurisdiction from the objection based on lis pendens at an early stage. The article on a state-court claim despite an arbitration clause explains the first objection and its timing.

Documents and order of review in practice

The identity review starts with the complete request for arbitration and its exhibits. Add the state-court statement of claim, any defences, notices of intervention, powers of attorney and service records. Excerpts or a note about the economic connection rarely establish party status reliably.

Prepare a comparison table with four columns: party in the arbitration, party in the state-court proceedings, claim asserted and legal consequence sought. Add filing dates and the procedural stage. This makes it visible whether the same claim is pending between the same parties.

When preparing arbitration proceedings, record whether and when a third person was expressly joined as a party. For related proceedings, distinguish lis pendens from consolidation of two VIAC arbitrations. Consolidation concerns several pending arbitrations, while lis pendens prevents a further proceeding over the same claim.

What the Supreme Court decision means for similar cases

8 Ob 119/25w answers the lis pendens issue by examining party status. The Supreme Court therefore did not need to decide finally whether the respondent was a member of the cooperative or whether the arbitration clause covered the dispute in substance. Those questions remain separate in other cases.

The decision establishes an order of analysis. First identify the parties and claim in the pending arbitration. Then compare the subject matter. Only if lis pendens does not already fail for lack of party identity do further objections and the scope of the arbitration clause become decisive.

The wording of the clause, request for arbitration, state-court statement of claim and any acts joining another person must be read together. The legal consequence depends on those documents and on the actual procedural status.

Frequently asked questions about lis pendens

When does lis pendens arise under section 584(3) ZPO?

According to the case law, lis pendens requires identity of the parties and the subject matter. A pending arbitration therefore prevents a further proceeding over the same claim between the same parties.

Does a necessary co-party automatically become a party to the arbitration?

No. Necessary joinder does not automatically bring a person who is absent from the request for arbitration into the proceeding. Joinder may be possible under certain conditions and must be documented in the arbitration.

How does lis pendens differ from an arbitration clause?

An arbitration clause concerns the agreement and its scope. Lis pendens concerns a pending arbitration and the identity of its parties and subject matter. The two issues are examined separately.

Next step

Contract, arbitration clause, correspondence and deadlines should be collected. It can then be assessed whether negotiation, preservation or arbitration is central.