A disagreement with how national judges weighed the evidence is not, by itself, an Article 6 complaint. Two Luxembourg cassation judgments of 8 May 2025 show why the Convention issue must be identified and framed precisely.
Large financial-crime proceedings can generate enormous case files.
Banking records, expert reports, international requests for assistance, police reports, corporate structures and years of procedural history may all have to be considered together.
Within such a record, identifying a genuine European Convention issue can be difficult.
Two judgments delivered by the Luxembourg Cour de cassation on 8 May 2025, no. 79/2025 pénal and no. 81/2025 pénal, provide a useful illustration.
Both were given in the same proceedings, on appeals against the same judgment of the Cour d'appel of 15 July 2024. The proceedings involved allegations including money laundering, drug-trafficking offences, forgery and fraud. Arguments based on Article 6 of the European Convention on Human Rights were raised before the Cour de cassation, including reliance on the presumption of innocence under Article 6 § 2.
The judgments illustrate an important distinction between challenging the national courts' assessment of evidence and identifying a genuine fair-trial issue.
Article 6 § 2 provides that everyone charged with a criminal offence is presumed innocent until proved guilty according to law.
The principle includes the basic proposition that the burden of establishing the elements of the offence lies on the prosecution and that an accused person does not have to prove his innocence.
The Luxembourg proceedings expressly addressed that principle.
But Article 6 does not transform Strasbourg — or a national cassation court applying Convention principles — into a court that simply reassesses every item of evidence.
That distinction is crucial.
In its conclusions in the case decided by judgment no. 81/2025, the Parquet général observed that Article 6 does not, as such, regulate the admissibility of evidence: that is primarily a matter for domestic law.
It nevertheless recognised that the presumption of innocence requires a criminal conviction to rest on sufficient and properly presented evidence.
It added that the trial courts assess the evidence freely, beyond any review by the Cour de cassation other than review of the reasoning.
The applicants' difficulty was elsewhere.
In judgment no. 79/2025, one complaint, although presented under Article 6 as a breach of the presumption of innocence and of the rule that doubt benefits the accused (in dubio pro reo), was considered in substance to challenge the assessment of facts and evidence by the trial courts.
The Cour de cassation held that such an assessment lay within the trial judges' sovereign power and outside its own review; the ground could not succeed, and the appeal was dismissed.
In judgment no. 81/2025, the ground based on Article 6 § 2, which relied on police reports, was declared inadmissible: it formulated no criticism of the judgment under appeal.
Yet the same appeal succeeded in part, on a separate ground of domestic law. The Cour de cassation quashed the convictions for money laundering by possession (blanchiment-détention, Articles 506-1(3) and 506-4 of the Code pénal): the appeal judges had relied in part on predicate offences of which all the defendants had been acquitted, and had not characterised the material element of the offence. The annulment also affected the sentence, in particular the confiscation, and the case was remitted to the Cour d'appel, differently composed.
This is highly instructive for Convention litigation.
A recurring mistake in human rights litigation is to take a disagreement with a national judgment and attach a Convention provision to it.
“The evidence was wrongly assessed, therefore Article 6 was violated” is not normally sufficient.
The legal task is to identify what aspect of the proceedings arguably crossed the threshold from an ordinary evidential disagreement into a problem of fairness protected by the Convention.
Examples may include an inability to challenge decisive evidence, serious inequality between prosecution and defence, failure to disclose relevant material, arbitrary refusal to examine a decisive argument or a conviction affected by conduct incompatible with the presumption of innocence.
The Convention issue must be defined precisely.
This becomes even more important before the European Court of Human Rights.
Strasbourg is not a fourth-instance tribunal.
It does not normally substitute its own assessment of facts, evidence or domestic law for that of national courts.
An application which simply invites the European Court to decide that the national judges should have believed different witnesses or attributed different weight to documents risks missing the real Convention question entirely.
The correct analysis is not:
“Was the domestic decision wrong?”
It is:
“Was the procedure, viewed as a whole, compatible with the guarantees of Article 6?”
That difference can determine admissibility.
Financial proceedings make this problem more acute because the underlying record can be enormous.
An applicant may have many objections to the investigation and judgment.
But only some may raise Convention issues.
The task is therefore one of selection.
Which procedural event is decisive?
Which right was affected?
Was the issue raised domestically?
What did the national court say about it?
Did the alleged defect affect the fairness of the proceedings as a whole?
Those questions are much more useful than simply reproducing the national defence case in Strasbourg.
The Luxembourg judgments also illustrate why the formulation of Convention arguments at national level matters.
A complaint that is ultimately intended for Strasbourg should normally have been sufficiently raised before the competent national courts.
But merely citing Article 6 may not preserve every possible Article 6 complaint.
The factual and legal substance of the grievance matters.
A Convention argument therefore needs to identify the alleged defect and connect it with the relevant protected right.
This becomes particularly significant at cassation level, where the distinction between questions of law and attempts to reopen factual assessment may be decisive.
Complex financial proceedings frequently contain potential Convention dimensions: presumption of innocence, equality of arms, access to evidence, judicial reasoning, searches, seizure of electronic material, confiscation and property rights.
But those issues have to be extracted from the domestic file and formulated as Convention questions.
The Luxembourg judgments of 8 May 2025 capture the essential lesson:
Invoking Article 6 is not the same as establishing an Article 6 complaint.
For cases that may later continue to Strasbourg, that distinction is fundamental.
The strength of a European human rights application depends not on the number of Convention provisions cited, but on identifying precisely what happened, why it engages a protected right and how the national courts addressed — or failed adequately to address — that issue.
These notes are general information on Convention law; they do not constitute legal advice and do not create a lawyer-client relationship.
After the final decision of the highest national court, a case may be submitted to us directly, by the client or by national counsel.