Criminal Cassation Appeal in Spain 2026: Viable Grounds and Strategy
In this article
Key Takeaways
- Five days to prepare the appeal
- Four defined grounds: Arts. 849, 851 and 852 LECrim
- Objective cassational interest since Law 41/2015
- Strategy: rank the grounds, do not accumulate
The criminal cassation appeal is built on limited, statutory grounds: infringement of substantive law (Art. 849.1 LECrim), error in the assessment of evidence based on a self-sufficient document (Art. 849.2), procedural defect (Arts. 850 and 851) and breach of a fundamental right (Art. 852). It is not a third instance and, except for the documentary-error ground, it respects the proven facts. The appeal is prepared within five days before the court that handed down the judgment and, once admitted, formalised within fifteen days before the Second Chamber of the Supreme Court (twenty if the trial court sits in the Balearic Islands and thirty in the Canary Islands, Ceuta or Melilla); the advisable strategy is to rank the grounds rather than pile them up.
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The criminal cassation appeal is the last technical-legal resort against a conviction upheld on appeal. As criminal lawyers specialising in Supreme Court appeals, we explain which grounds have real prospects and how to design an effective strategy before the Second Chamber.
Decisions Open to Cassation
Law 41/2015 deeply reformed the criminal cassation regime. The following are open to cassation: judgments delivered on appeal by the Provincial Courts and the Criminal Chamber of the National Court (where the conviction is for an offence, not a minor offence); judgments of the High Courts of Justice on appeal; judgments of the High Courts of Justice at single instance concerning persons with special standing; and final orders ending the procedure for lack of jurisdiction or free dismissal, where the case had been directed against the accused by a well-founded charging decision (Art. 848). Interlocutory orders and minor-offence judgments are generally excluded.
Viable Grounds: Arts. 849, 851 and 852 LECrim
Cassation is built on defined grounds. It is not a third instance and does not allow the free review of the facts.
Art. 849.1 LECrim — Infringement of law by the undue application or non-application of a substantive rule. The leading ground. It allows arguing that the court applied a substantive criminal rule wrongly. What is decisive is absolute respect for the proven facts: you cannot dispute the evidence, only the legal classification.
Art. 849.2 LECrim — Error in the assessment of evidence based on a document. A more restrictive ground, requiring a self-sufficient document that contradicts a proven fact and is not contradicted by other evidence.
Art. 851 LECrim — Procedural defect. Encompasses the in procedendo defects of the judgment: lack of clarity in the proven facts, predetermination of the verdict, and a failure to rule on the defence's claims (omission incongruence).
Art. 852 LECrim — Breach of a fundamental right. The route for denouncing breaches of substantive or procedural fundamental rights: presumption of innocence, effective judicial protection, secrecy of communications, right of defence. The most used ground in serious criminal defences.
Deadlines, Court Agent and Supreme Court Specialist Lawyer
The cassation procedure begins with the preparation of the appeal before the court that delivered the judgment, within five days of the last notification. Once the preparation is admitted, you have fifteen days (twenty from the Balearic Islands and thirty from the Canary Islands, Ceuta or Melilla) to appear before the Second Chamber and formalise the appeal (Arts. 859 and 873 LECrim). The involvement of a lawyer who regularly appears before the Second Chamber of the Supreme Court is the differential factor, because the admission filter in cassation is very demanding.
Cassation for Objective Cassational Interest
After Law 41/2015, cassation for cassational interest was introduced for judgments delivered by the Provincial Courts on appeal in abridged procedures with a penalty of up to five years. Here only the ground of Art. 849.1 LECrim applies, and the Second Chamber admits the appeal if cassational interest concurs: the judgment departs from Supreme Court case law, it rules on issues where the Provincial Courts' case law conflicts, or it applies rules in force for less than five years without settled Supreme Court case law on similar earlier rules.
Procedural Strategy: Selection and Hierarchy of Grounds
A well-built cassation brief does not accumulate grounds: it ranks them. The recommended strategy is: first, the grounds for the breach of a fundamental right (Art. 852) — if they succeed, they may lead to an acquittal; second, the procedural defects (Art. 851), which lead to nullity; third, the infringement of substantive law (Art. 849.1), which reclassifies the offence or reduces the penalty; fourth, the documentary error (Art. 849.2). The Supreme Court values concision, technical precision and the relevant citation of case law.
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You have only five days to prepare the cassation appeal. The technical quality of the brief determines its admission.
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Official text: article 849 of the Spanish Criminal Procedure Law (BOE)
Frequently asked questions
What grounds allow a criminal cassation appeal to be lodged?
Cassation is built on limited, statutory grounds: infringement of substantive law (Art. 849.1 LECrim), error in the assessment of evidence based on a self-sufficient document (Art. 849.2), procedural defect (Arts. 850 and 851) and breach of a fundamental right (Art. 852). It is not a third instance and does not allow the facts to be freely reviewed.
What is the deadline to prepare a cassation appeal?
The appeal is prepared before the court that handed down the judgment within five days of the last notification, announcing the grounds. Once the preparation is admitted, there are fifteen days (twenty from the Balearic Islands and thirty from the Canary Islands, Ceuta or Melilla) to appear before the Second Chamber and formalise the appeal by means of the statement of appeal (Arts. 859 and 873 LECrim).
Which decisions can be appealed in cassation?
After Law 41/2015, appealable decisions include judgments given on appeal by the Provincial Courts and the National Court where the conviction is for an offence and not a minor offence, those of the High Court of Justice on appeal, those of privileged defendants given by the High Court of Justice at single instance, and final orders ending the proceedings for lack of jurisdiction or free dismissal (Art. 848). As a general rule, interlocutory orders and judgments for minor offences fall outside.
What is the appeal on the ground of cassational interest?
After Law 41/2015, a cassation appeal on the ground of cassational interest is also available for judgments given by the Provincial Courts on appeal in summary proceedings with a penalty of up to five years, solely on the ground under Art. 849.1 LECrim. The Second Chamber only admits it where there is cassational interest: the judgment departs from Supreme Court case law, it rules on issues where the Provincial Courts' case law conflicts, or it applies rules in force for less than five years without settled Supreme Court case law on similar earlier rules.
How should the appeal strategy be structured?
A well-drafted appeal ranks the grounds rather than piling them up: first the breach of a fundamental right (Art. 852), then the procedural defect (Art. 851), next the infringement of substantive law (Art. 849.1) and, lastly, the documentary error (Art. 849.2). The Supreme Court values concision, technical precision and the pertinent citation of case law.
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