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The presumption of innocence and in dubio pro reo in Spain
Quick answerThe presumption of innocence under article 24.2 of the Spanish Constitution requires every conviction to rest on valid incriminating evidence, taken with the safeguards of publicity, orality, immediacy and adversarial examination, and sufficient to found certainty rationally. In dubio pro reo, by contrast, operates where evidence exists but the court harbours a reasonable doubt; as a rule of assessment it is not reviewable in cassation unless the doubt is expressed in the judgment.
Also cited as: presumption of innocence · in dubio pro reo · presunción de inocencia · burden of proof in criminal proceedings · article 24.2 of the Spanish Constitution.
The two are often invoked interchangeably yet resolved on different planes. The presumption of innocence is a fundamental right operating both as a rule of decision and as a rule of treatment of the suspect, and its breach is reviewed by verifying whether incriminating evidence existed, whether it was lawful and whether the reasoning leading to conviction is rational. In dubio pro reo is a criterion for deciding in the face of the court’s subjective doubt. The distinction determines the route of appeal and explains why so many grounds fail by presenting as a presumption-of-innocence point what is in truth a disagreement about the assessment of evidence.
Legal framework
Article 24.2 of the Spanish Constitution: likewise, everyone has the right to the ordinary judge predetermined by law, to a defence and to legal assistance, to be informed of the charge against them, to a public trial without undue delay and with full safeguards, to use the evidence relevant to their defence, not to testify against themselves, not to confess guilt, and to the presumption of innocence.
Article 6.2 of the European Convention on Human Rights: everyone charged with a criminal offence shall be presumed innocent until proved guilty according to law.
Article 741 of the Criminal Procedure Act: the court, appraising according to its conscience the evidence taken at trial, the arguments of the prosecution and the defence and the statements of the defendants themselves, shall deliver judgment within the period laid down in this Act.
Statutory texts cited from the consolidated versions published by the Spanish Official State Gazette. Unofficial English rendering; the Spanish text is the authentic one.
Key rule. The burden of proof rests entirely on the prosecution. The defendant need not prove innocence and silence may not be counted as an indication of guilt.
Key facts
| Nature | Fundamental right under article 24.2 of the Constitution, of direct effect |
|---|---|
| Two dimensions | Rule of decision in the judgment and rule of treatment during the proceedings |
| Burden of proof | Entirely on the prosecution, with no reversal in any case |
| Requirements of incriminating evidence | Existence, lawfulness, taking with safeguards and rational sufficiency |
| In dubio pro reo | Rule of assessment in the face of the court’s reasonable doubt |
| Review in cassation | Broad for the presumption of innocence; restricted for in dubio pro reo |
| Right to silence | Silence is no incriminating indication and does not cure insufficient evidence |
Elements and scope
- The existence of incriminating evidence, that is, evidential activity directed at establishing the elements of the offence and the defendant’s participation. A total absence of evidence requires acquittal without any need to assess it.
- Lawfulness of the evidence, excluding anything obtained in breach of fundamental rights under article 11.1 of the Judiciary Organic Act.
- Taking at trial with publicity, orality, immediacy and adversarial examination, save in the limited cases of pre-constituted and anticipated evidence.
- Sufficiency, understood as the rational capacity of the body of evidence to found certainty beyond reasonable doubt, excluding mere suspicion and conjecture.
- Reasoning in the judgment setting out the path followed, without which review of the fundamental right is impossible.
Points of application
Presumption of innocence as against in dubio pro reo. The Second Chamber of the Supreme Court draws a clear line between the two. The former is breached where there is no incriminating evidence or it is unlawful or insufficient; the latter may be invoked in cassation only where the trial court expressed its doubt and convicted nonetheless.
Scope of review in cassation. Review does not permit a fresh assessment of personal evidence, but verification of the existence, lawfulness, regularity and sufficiency of the incriminating evidence and of the rationality of the evidential reasoning.
The defendant’s silence. The right not to testify and not to confess guilt precludes any incriminating inference from silence. Case law accepts only that the absence of an explanation may be weighed where sufficient incriminating evidence already calls for an answer.
Acquittals. The presumption of innocence may not be invoked by the prosecution. Reversing an acquittal by reassessing personal evidence is barred without hearing the defendant, under constitutional doctrine and that of the European Court of Human Rights.
Dimension beyond the proceedings. As a rule of treatment, the presumption of innocence has effects on precautionary measures, on the publicity of proceedings and on statements by public authorities concerning the suspect’s guilt.
Defence strategy
Define the ground precisely. It must be clear whether the complaint concerns absence of evidence, unlawfulness, irregularity in the taking of evidence or rational insufficiency. Merging them into a single ground is the commonest cause of dismissal.
Do not dress up disagreement as a presumption-of-innocence point. Arguing that the court should have believed one witness rather than another does not breach the fundamental right. Such a plea should be reframed as a review of the rationality of the reasoning.
Preserve the right to silence. The decision whether the client testifies should be taken after the prosecution evidence is known, and it is advisable to record that silence may not be weighed against him.
Demand evidential reasoning. A judgment that does not state which evidence supports each element of the narrative prevents review and may be challenged for breach of effective judicial protection.
Invoke in dubio pro reo only where it applies. The ground succeeds only where the judgment expresses the doubt. Otherwise it must be framed as insufficiency of the incriminating evidence.
Are you under investigation or facing charges in Spain? Société Juridique acts for foreign nationals throughout Spain, with offices in Alicante and Madrid and a 24-hour custody line. +34 669 30 21 13 or enquire online.
- Spanish Criminal Code by article
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This page is provided for information only and does not constitute legal advice. The application of any provision depends on the circumstances of the case and requires review of the file by a lawyer. The English rendering of the legal text is unofficial.
Last reviewed: 21 September 2026.
Frequently asked questions
Who has to prove guilt?
The prosecution, entirely. The defendant bears no burden of proof and need not establish innocence at any stage of the proceedings.
Does exercising the right to silence harm me?
No. Silence is no incriminating indication and does not cure insufficient prosecution evidence. Case law allows the absence of an explanation to be weighed only where sufficient evidence already calls for one.
What is the difference from in dubio pro reo?
The presumption of innocence operates where there is no valid or sufficient incriminating evidence. In dubio pro reo applies where, evidence existing, the court harbours a reasonable doubt and convicts nonetheless.
Can evidence be reviewed in cassation?
Not for reassessment. Review is limited to verifying that lawful incriminating evidence existed, was regularly taken and was sufficient, and that the judgment’s reasoning is rational.
May the prosecution invoke the presumption of innocence?
No. It is a right of the defendant. A prosecution appealing an acquittal must proceed on other grounds and cannot obtain a conviction by reassessing personal evidence without hearing the defendant.
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