Citing the Wrong Article Does Not Cause Prejudice if the Facts Were Clear (STS 321/2026)

STS 321/2026, of 5 May, dismisses a cassation appeal and examines a practical issue that arises with some frequency: what happens when the prosecution cites the wrong criminal provision. The Second Chamber of the Supreme Court offers a clear criterion that defines the scope of the accusatory principle and its relationship with material prejudice.

The accusatory principle and its essential content

The accusatory principle is one of the structural safeguards of criminal proceedings. It requires that there be no conviction without a prior charge, that the court cannot convict for facts other than those charged or on a legal classification the defence was unable to challenge, and that the accused must understand with sufficient clarity what they are accused of in order to prepare their defence.

The Supreme Court has repeatedly emphasised that the accusatory principle does not protect the formal accuracy of every statutory citation made by the prosecution. Its object is the prohibition of material prejudice: the imputed facts, their relevant circumstances and the provisional classification must be sufficiently identifiable by the person who has to defend against them. The distinction between formal error and substantive breach is precisely the core of the doctrine developed in this ruling.

The numbering error and its effects

The Chamber reasons that an error in the numbering of the articles does not produce material prejudice when three cumulative conditions are met. First, the error must have been recognisable: a reasonable reading of the charge and the statement of facts supporting it must allow identification of the provision actually being applied and the conduct being charged. Second, the error must not have introduced new and unforeseeable elements that the defence could not have anticipated or challenged. Third, the factual account must contain the essential elements of the offence for which the accused is ultimately convicted, so that the defence had real access to the relevant facts and circumstances.

Where those three conditions are met, the citation error remains at the level of formal inaccuracy without procedural significance. What is decisive is not the technical perfection of the statutory reference, but whether the accused was able to understand and oppose the imputed facts.

ECHR doctrine on knowledge of the charge

The ruling expressly relies on the European Court of Human Rights doctrine under Article 6(3) of the European Convention on Human Rights, which recognises every accused person's right to be informed of the nature and cause of the accusation against them. The ECHR has stressed that this guarantee does not impose formal accuracy for every statutory reference, but requires that the charge be sufficiently precise and detailed for the accused to understand the facts imputed and to organise their defence.

The Supreme Court incorporates that perspective into domestic law, shifting the analysis to the plane of actual prejudice rather than technical perfection of the charge. This approach also allows the present situation to be distinguished from cases where a surprise reclassification without prior warning does breach the accusatory principle, as occurred in the ruling that addressed a reclassification of facts without giving the defence time to react.

Aggravating element and sufficiency of the factual account

The judgment emphasises that the analysis is not limited to the basic offence but extends to aggravating elements. For the statutory citation error to be harmless, the statement of facts must identify not only the core conduct of the offence, but also the circumstances that trigger the aggravated form. If the aggravating element appears with sufficient clarity in the factual account, the defence has the opportunity to challenge it even if the statutory reference was incorrect.

This point has practical relevance in drafting charges, where numbering errors may coexist with a complete factual description. The Chamber notes that the sufficiency of that description is a question to be assessed in each case, without any automatic answer either for or against prejudice.

Implications for the defence against defective charges

The doctrine of this ruling has direct implications for the defence strategy when the prosecution makes citation errors. The defence must assess whether the error is merely formal — recognisable, without new elements, with a sufficient factual description — or whether, on the contrary, it generated actual prejudice by preventing knowledge of or challenge to some essential element of the charge.

In the former scenario, challenging the error in cassation as an autonomous ground has little prospect of success. In the latter, the complaint must be raised at the appropriate procedural stage, articulating precisely what the actual prejudice consisted of: which element of the charge could not be challenged and why the error was, in substance, not merely formal. That clarity of argument is what determines the viability of the ground on cassation.

Value of the ruling for challenging defective charges

STS 321/2026 is a useful reference for analysing the validity of charges containing citation errors, both from the prosecution's perspective — which may rely on it to defend the effectiveness of a technically imperfect document — and from the defence's perspective, which now has the criteria that define when such an error does produce material prejudice.

The ruling also reinforces the importance of the factual account as the central element of the charge. A clear, complete statement of facts covering all the relevant elements of the offence and its aggravations narrows the scope for challenge on formal errors and strengthens the prosecution. Conversely, an incomplete or ambiguous factual description may turn a formal error into a substantive breach of the accusatory principle, with the procedural consequences that follow under the LECrim.