Joinder and separation of civil cases: the limits of the Court of Cassation's review in Order no. 31088 of 2025

In the landscape of Italian civil procedural law, the efficient management of time and resources during proceedings is largely entrusted to the discretion of the trial judge. Among the primary tools for ensuring procedural speed and economy are the joinder and separation of cases, cornerstone legal instruments governed by Articles 273 and 274 of the Code of Civil Procedure. Order no. 31088 of November 27, 2025, issued by the Second Civil Section of the Court of Cassation, revisits this delicate issue, confirming a rigorous interpretive approach that is now well-established in the jurisprudence of the court of last resort.

The case and the decision of the Supreme Court

In the case at hand, which involved L., represented by attorney W. M., and another party L., represented by attorney F. D., the Court of Appeal of Salerno had rejected the appeal concerning the management of related proceedings. The Court of Cassation, presided over by Dr. Aldo Carrato and with the report delivered by Councilor Chiara Besso Marcheis, dismissed the appeal, fully upholding the decision of the lower court. At the heart of the debate was the legitimacy of the appellate judge's choices regarding the joint or separate handling of the cases.

The judge's discretion and the nature of the measures

To understand the scope of the decision, it must be recalled that measures for the joinder and separation of cases are typically organizational in nature and not dispositive. They aim to coordinate judicial activity to avoid conflicting judgments and to ensure the constitutional principle of the reasonable duration of the trial (Art. 111 of the Constitution).

In particular, the Supreme Court reiterated the following key points:

• The assessment of the advisability of joinder or separation rests exclusively with the trial judge.
• Such a choice is based on a judgment of expediency that balances objective or subjective connection with the concrete requirements of speed for the individual docket.
• The measures in question do not prejudice the decision on the merits of the case, as they are limited to regulating the procedural path.

The measure of joinder or separation of related cases, having an organizational and discretionary nature, is not subject to review by the court of last resort under the profile of a defect in reasoning, unless the trial judge's choice has concretely violated the right of defense or other fundamental principles of due process.

This principle highlights how the Court of Cassation's review is extremely limited on such matters. As these are purely organizational decisions, the court of last resort cannot substitute its own assessment for that of the trial judge, unless a clear and serious violation of the right of defense (Art. 24 of the Constitution) is identified, which has harmed the effective exercise of the parties' procedural rights.

Conclusions and practical implications for professionals

In conclusion, Order no. 31088 of 2025 follows a jurisprudential path aimed at discouraging instrumental appeals based on the mere procedural management of cases. For lawyers and parties involved in civil litigation, this means that the defense strategy cannot be limited to a generic challenge of the magistrate's organizational choice, but must be based on the concrete demonstration of any serious prejudice suffered as a result of the separation or joinder of the proceedings.