Updated to LO 1/2026 and LO 1/2025 · Reviewed July 2026 · Author: Francisco Javier Martín Porras, criminal lawyer and court expert · SCJE team
Nine out of ten Spanish criminal cases are processed through the abbreviated procedure: offences punishable with up to 9 years. From the report to the trial it passes through stations with their own names (preliminary proceedings, transformation order, opening of the trial, qualification briefs) and at each one different things are won or lost. We comment on it in full, with the moments where defence and prosecution must be especially awake.
In brief. In brief. Scope: offences punishable with up to 9 years of imprisonment (art. 757 LECrim). The preliminary proceedings have maximum investigation periods (art. 324). The transformation order delimits the facts: what is not in it does not enter the trial. The opening of the trial is unappealable save exceptions: the battle is before.
The abbreviated procedure concentrates the bulk of Spanish criminality: frauds, assaults, minor trafficking, gender violence, medium-sized economic offences. Its route runs from the preliminary proceedings (statement of the investigated person under art. 775, investigative measures, precautionary decisions, all under the time limits of art. 324), through the transformation order of art. 779.1.4ª that fixes the objective and subjective perimeter of the process, to the qualification briefs, the opening of the trial, the mandatory preliminary hearing of art. 785 introduced by LO 1/2025, the trial itself and the appeal of art. 790.
Our defence method by station: control of the time limits of art. 324, because measures ordered out of time are unusable; appeal against the transformation order to remove facts and persons; a defence brief with express challenges of expert reports and documents; and the preliminary hearing of art. 785 prepared as the single, preclusive trench of nullities, evidence and plea agreement.
| Station | Legal basis | Content | What is at stake |
|---|---|---|---|
| Scope | Art. 757 LECrim | Offences with penalties of up to 9 years | Qualification disputes decide procedure and court |
| Preliminary proceedings | Arts. 774 et seq. LECrim | Statement of art. 775, measures, precautionary decisions | Access to the file before declaring; suspension otherwise |
| Investigation time limits | Art. 324 LECrim | 12 months extendable by 6-month periods with reasoned order | Measures ordered out of time are invalid |
| Transformation order | Art. 779.1.4ª LECrim | Account of facts and identified persons; perimeter of the trial | Reform in 3 days and appeal in 5: facts and persons removed |
| Accusation and opening | Arts. 780 to 783 LECrim | Qualifications and opening order, unappealable save exceptions | Dismissal requested with acquittal-level technique |
| Defence brief | Art. 784 LECrim | Qualification, evidence, express challenges, possible agreement | Unchallenged expert reports may be assessed as documents |
| Preliminary hearing | Art. 785 LECrim | Preclusive: nullities, evidence, plea agreement, jurisdiction | What is not raised there does not revive at trial |
| Trial and appeal | Arts. 786 to 793 LECrim | Purged trial; appeal within 10 days on the grounds of art. 790.2 | Protests and the recording are the raw material of the appeal |
Summary drawn from the Spanish source page for orientation purposes. The applicable provisions are those in force at the relevant time; each case requires individual analysis by a criminal lawyer.
Original commentary by the firm, checked against the reference work in our library: Ley de Enjuiciamiento Criminal Comentada, Lefebvre-El Derecho, 13th edition, May 2026. The best trial remains the one that is not held: between the statement of art. 775 and the opening order there are useful months to work on the dismissal.
The statement with prior access to the file is a right: we prepare it as if it were the trial, because it shapes everything. Without effective access, we request the suspension.
The transformation order is not a conviction, but it delimits what you can be accused of. You have 3 days for reform and 5 for appeal: appealing it well can remove facts, offences or persons from the process.
Art. 324 imposes 12 months extendable by 6-month periods with a reasoned order before expiry. Without a valid extension, subsequent measures are invalid: more closures arrive today through art. 324 than through almost any other route.
The hearing of art. 785 is preclusive: nullities, evidence and plea agreement must arrive prepared, with a written script and literal record of protests as the matrix of the future appeal.
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