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The double conforme rule and the ban on conviction on appeal in Spain
Quick answerAct 41/2015 generalised the criminal second instance and prohibited the appeal judgment from convicting a defendant acquitted at first instance or from aggravating the sentence on the basis of an error in the assessment of the evidence (article 792.2 of the Criminal Procedure Act). The appeal court may only set the judgment aside and remit the case. An appeal in cassation against the appeal judgment lies in the cases set out in article 847.
Also cited as: double conforme · criminal second instance · ban on conviction ex novo on appeal · article 792.2 Criminal Procedure Act · article 847 Criminal Procedure Act
Until the 2015 reform, the Spanish system entrusted review of the judgments of the Provincial Courts to cassation, with very restricted access. Act 41/2015 completed the second instance and, in doing so, had to resolve a classic problem: whether a court that has not witnessed the oral evidence may turn an acquittal into a conviction. The statutory answer is negative, and it is implemented through annulment and remittal.
Legal framework
Article 792.2 of the Criminal Procedure Act: the appeal judgment may not convict a defendant acquitted at first instance, nor aggravate the conviction imposed on that defendant, on the basis of an error in the assessment of the evidence within the meaning of the third paragraph of article 790.2. However, the judgment, whether of acquittal or of conviction, may be set aside, in which case the case is remitted to the court that delivered the decision under appeal. The appeal judgment shall specify whether the annulment extends to the trial and whether the principle of impartiality requires a new composition of the first-instance court.
Article 792.3 of the Criminal Procedure Act: where the judgment under appeal is set aside for breach of an essential procedural requirement, the court, without entering into the merits, shall order the proceedings to be restored to the stage at which the defect occurred, without prejudice to the validity of all acts whose content would have been identical notwithstanding the defect.
Article 792.4 of the Criminal Procedure Act: an appeal in cassation against the appeal judgment lies only in the cases provided for in article 847, without prejudice to the review of final judgments or to the challenge of final judgments delivered in the absence of the accused.
Article 847.1 of the Criminal Procedure Act: cassation lies for infringement of substantive law and for procedural defect against judgments delivered at first instance or on appeal by the Civil and Criminal Chamber of the High Courts of Justice and against those of the Appeals Chamber of the National High Court; and for infringement of substantive law on the ground set out in article 849.1 against judgments delivered on appeal by the Provincial Courts and by the Criminal Chamber of the National High Court.
Article 847.2 of the Criminal Procedure Act: judgments confined to declaring the nullity of first-instance judgments are excluded.
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. An appeal court that disagrees with the trial court’s assessment of the evidence may not enter a conviction: its only course is to set the judgment aside and remit the case, specifying whether the annulment extends to the trial and whether a new composition of the court is required.
Key facts
| Applicable reform | Act 41/2015 of 5 October, in force since 6 December 2015 |
|---|---|
| Core content | Ban on convicting on appeal a defendant acquitted below |
| Complementary ban | Ban on aggravating the sentence on the basis of an error in assessing the evidence |
| Statutory alternative | Setting the judgment aside and remitting the case |
| Mandatory specification | Whether the annulment extends to the trial and whether a new composition is required |
| Procedural defect | Restoration to the stage of the defect, preserving acts of identical content |
| Further appeal | Cassation in the cases of article 847 |
| Restricted cassation | Only for infringement of substantive law under article 849.1 against Provincial Court appeal judgments |
| Exclusion | Judgments confined to declaring the nullity of the first-instance judgment |
| Notification | To the injured parties even where they have not appeared in the proceedings |
Elements and scope
- An acquittal at first instance, or a conviction that the prosecution seeks to aggravate. The provision operates on the outcome of the judgment under appeal and not on the legal classification in the abstract.
- Disagreement over the assessment of the evidence. The ban is triggered where the review sought rests on an error in assessing the evidence, a field closed to a court that has not witnessed it.
- Immediacy and confrontation. The underlying rationale is that oral evidence cannot be reassessed without direct presence, a requirement recognised by Spanish constitutional and by European case law.
- Annulment as the only route. An appeal court that finds error must set the judgment aside and remit, with an express ruling on the scope of the annulment.
- Impartiality of the court on remittal. The appeal judgment must consider whether the principle of impartiality requires the fresh trial to take place before a differently composed court.
Points of application
Strictly legal questions. The ban does not prevent errors of legal classification from being corrected on appeal where the statement of facts found proved remains intact; what is prohibited is the reassessment of oral evidence.
Uncontested facts and documentary evidence. Review of documentary or documented expert evidence allows greater latitude, but the case law requires caution where its assessment is intertwined with oral testimony.
Subjective elements of the offence. The finding of intent or of an intention to defraud has traditionally been treated as a question of law, although constitutional doctrine requires the accused to be heard where its determination depends on oral evidence.
Scope of the annulment. The appeal judgment must specify whether the annulment extends to the trial; failure to rule creates uncertainty as to the object of the remittal and is a ground of challenge.
Cassation against the appeal judgment. Article 847.1(b) restricts access to the ground of infringement of substantive law under article 849.1 where the appeal has been decided by a Provincial Court, which requires the appeal to be framed with absolute respect for the facts found proved.
Defence strategy
Delimit the factual and the legal ground in the response to the appeal. Where the prosecution is the appellant, it is useful to show that its case conceals a reassessment of the evidence and that the court therefore may not convict.
Object to conviction ex novo in the response to the appeal. Article 792.2 must be invoked expressly when responding to the appeal, rather than waiting for a possible cassation.
Insist on a ruling as to the scope of the annulment. If the court sets the judgment aside, it must specify whether the annulment extends to the trial and whether a new composition is required; omission prejudices the accused and is open to challenge.
Invoke the impartiality of the court on remittal. Where the same court that has already assessed the evidence would try the case again, a new composition should be sought under article 792.2 itself.
Frame the cassation appeal on the facts found proved. Against appeal judgments of the Provincial Courts, only the ground under article 849.1 is available, which requires the statement of facts to be taken as it stands.
Watch the ban on reformatio in peius. Where only the convicted person appeals, the position may not be worsened as to the sentence, the civil liability or the ancillary rulings.
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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: 23 September 2026.
Frequently asked questions
Can the Provincial Court convict on appeal a defendant who was acquitted?
No. Article 792.2 of the Criminal Procedure Act expressly prohibits it; the court may only set the judgment aside and remit the case.
And can it aggravate a sentence already imposed?
Not where the aggravation rests on an error in the assessment of the evidence, within the terms of the third paragraph of article 790.2 to which article 792.2 refers.
What must a judgment setting the decision aside state?
It must specify whether the annulment extends to the trial and whether the principle of impartiality requires a new composition of the first-instance court.
Is there an appeal against the appeal judgment?
Only cassation in the cases of article 847, which against judgments of the Provincial Courts is confined to the ground of infringement of substantive law under article 849.1.
Can a judgment that merely annuls be appealed in cassation?
No. Article 847.2 expressly excludes judgments confined to declaring the nullity of first-instance judgments.
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