Validity of a Complaint Without Authentication: Analysis of Supreme Court Ruling No. 19028/2025

In the complex landscape of criminal law, a complaint (querela) is a fundamental act for initiating numerous proceedings. Its correct drafting and submission are often the subject of debate and jurisprudential interpretation. A particularly delicate aspect concerns the necessity of signature authentication. The Supreme Court of Cassation, with its recent ruling No. 19028 of 2025, has pronounced on a specific case, providing an illuminating interpretation that aims to balance formal requirements with the substance of the act.

The Complaint in the Italian Legal System: Requirements and Function

A complaint is the manifestation of will, by the victim of an offense not subject to prosecution ex officio, to proceed criminally against the perpetrator (Art. 336 c.p.p. - Code of Criminal Procedure). It is a highly personal and irrevocable act (unless withdrawn) which, once submitted, sets the justice system in motion to protect individual legal interests. Its importance is such that the legislator has provided specific procedures for its submission, as outlined in Art. 337 c.p.p., which governs its declaration and form.

Traditionally, one of the most debated formal requirements has been the authentication of the signature. This authentication aims to guarantee the origin of the document from the person who signs it and their full intent. However, what happens when a complaint is submitted without the signature being authenticated, but in a context that nonetheless attests to its genuineness?

The Crux of Authentication: The Context of Ruling No. 19028/2025

The issue addressed by the Supreme Court in ruling No. 19028 of 2025, issued by Section 5 (President M. G. R. A., Rapporteur O. A.), concerns precisely such a case. The defendant, B. G., was involved in proceedings where the complaint had been filed by P. M. T. without her signature being authenticated. However, the complaint had been filed concurrently with the appointment of a trusted defense lawyer by the same victim, an act in which the lawyer's signature was duly authenticated. The Court of Syracuse, on 30/10/2024, had evidently raised doubts about the validity of such a complaint, but the Court of Cassation annulled the decision with referral.

The Court had to resolve the conflict between the need to respect the formal requirements of the complaint and the necessity of not nullifying the victim's will when it is clearly expressed through other concurrent procedural acts. The maxim that synthesizes the principle expressed is as follows:

The lack of authentication of the signature affixed to the complaint does not render it invalid if it is filed concurrently with the appointment of a trusted defense lawyer by the same victim, with the signature authenticated by the lawyer.

This ruling is of fundamental importance. The Court of Cassation, in line with previous precedents (such as No. 9722 of 2009 Rv. 242977-01), has reaffirmed a principle of substantiality. The authentication of the signature on the complaint is not an end in itself, but a means to ensure that the act genuinely originates from the victim and is an expression of their will. If this guarantee is provided by another concurrent and equally certain act, such as the appointment of a trusted defense lawyer with a signature authenticated by the lawyer, then the substantive requirement is met.

This means that the validity of the complaint is assured if the following conditions are met:

• The complaint lacks the authentication of the victim's signature.
• The complaint is filed concurrently (i.e., at the same time) with another act.
• This concurrent act is the appointment of a trusted defense lawyer by the same victim.
• The signature of the trusted defense lawyer on the appointment document has been authenticated by the lawyer themselves.

In this way, the identity of the victim and their will to file a complaint are certified by the intervention of the lawyer, who assumes full responsibility for the origin of the act, in accordance with Articles 96 and 101 c.p.p. regarding the appointment and powers of the defense lawyer.

Practical Implications and Jurisprudential Trends

This decision has significant practical implications. For citizens, it means that a purely formal defect on the complaint, when accompanied by a clear and verifiable manifestation of will through their lawyer, will not prejudice criminal action. For legal professionals, it offers greater clarity on how to handle similar situations, preventing mere formal imperfections from hindering access to justice. Jurisprudence increasingly tends to favor substance over form, especially when the subject's will is unequivocal and guaranteed by professional figures such as lawyers, who assume precise ethical and legal responsibilities.

Conclusions: A Balance Between Form and Substance

Supreme Court ruling No. 19028 of 2025 represents an important step in the interpretation of criminal procedural rules. It confirms the trend of a judicial system that, while maintaining firm principles of guarantee and legality, knows how to adapt to ensure the effectiveness of rights protection. The validity of a complaint, even in the absence of direct signature authentication, if supported by an authenticated lawyer's appointment, is an example of how jurisprudence seeks a balance between formal rigor and the need not to obstruct the exercise of a fundamental right such as that of resorting to legal channels. For any doubts regarding the correct drafting and submission of a complaint, it is always advisable to consult a legal professional.