Prohibition of Reformatio in Peius and Plea Bargain on Appeal: Commentary on Criminal Cassation No. 14325/2025

With the decision under review, the Court of Cassation returns to a recurring theme: the interference between a plea bargain on appeal pursuant to art. 599-bis c.p.p. and the prohibition of reformatio in peius governed by art. 597, paragraph 3, c.p.p. Judgment No. 14325 of 2025, rendered by the First Section, offers operational insights of great utility for lawyers and criminal law practitioners, establishing a legal principle destined to impact defensive strategy in appeals.

The Regulatory Context

The prohibition of reformatio in peius prevents the final decision from being more unfavorable than the first-instance judgment when the appeal is filed solely by the defendant. Art. 597, paragraph 3, c.p.p. defines its scope, while art. 599-bis c.p.p. governs the plea bargain on appeal, an expedited procedure that allows parties to agree on the penalty within certain limits.

The issue raised before the Court concerns the legitimacy of an agreement that, while reducing the overall penalty, worsened the sanctioning treatment for one of the individual calculation steps, by re-evaluating an aggravating circumstance (art. 416-bis.1 c.p.) which the first-instance judge had balanced with general mitigating circumstances in terms of equivalence.

The Ruling and its Meaning

In matters of appeals, a cassation appeal is admissible against a judgment issued following a plea bargain on appeal, alleging a violation of the prohibition of "reformatio in peius" in the intermediate steps of the final penalty determination.

The Court states that the prohibition does not operate solely on the final quantum but affects every segment of penalty assessment. If, in the intermediate steps, there is an aggravation compared to the first-instance ruling not appealed by the Public Prosecutor, the defendant may appeal to the Court of Cassation, even if the overall agreement appears more favorable.

The Facts of the Case and the Decision

In this case, the defendant S. S. had agreed to a reduced penalty on appeal. However, the new calculation included a specific increase for the mafia aggravating circumstance ex art. 416-bis.1 c.p. The first-instance judge had instead offset it with general mitigating circumstances. The appellant complained precisely of this “micro-peius” within the calculation.

The Court upheld the ground, quashing and remanding the judgment of the Court of Appeal of Catania of 18/01/2024. It referred to consistent precedents (Cass. 22487/2024) and distanced itself from the contrary orientation formed in 2019 and subsequently re-emerged (Cass. 22002/2019, 7399/2025), reaffirming a more protective principle.

Practical Implications for the Defense

• Attention to Calculation Details: Before agreeing to a plea bargain, it is necessary to verify that no single step worsens the defendant's position.
• Drafting the Appeal Document: The defect must be precisely alleged, indicating the stage of the assessment where the violation occurs.
• Role of the Public Prosecutor: If the public prosecutor has not appealed the first-instance decision, any aggravation becomes inadmissible.
• Renegotiation Prospects: After quashing and remanding, the parties can reshape the agreement to comply with the prohibition.

The ruling consolidates the defendant's protection, pushing appellate courts to rigorously control the correct application of the prohibition of reformatio in peius even in consensual proceedings.

Conclusions

Judgment No. 14325/2025 is part of an evolving landscape of case law aimed at preventing evasions, even implicit ones, of the prohibition of reformatio in peius. The principle expressed strengthens the predictability of decisions and defendants' trust in preferential proceedings: those who agree to a plea bargain must be able to count on treatment that does not worsen even one of the penalty elements compared to the pre-existing situation, unless the Public Prosecutor initiates an appeal. For defense attorneys and magistrates, this is an orientation to keep in mind in daily procedural practice.