Failure to Prevent an Offence (Art. 450 CP): When Not Acting Is a Crime in Spain

Spanish criminal law generally punishes what is done, not what is left undone. The exceptions are closed and Art. 450 CP is one of the most important: it makes it an offence to witness the commission of certain serious crimes and fail to intervene where intervention was possible without risk. It is a little-known provision that appears regularly in incidents of violence witnessed by third parties, and it is often confused with two very different figures: commission by omission and failure to render assistance.

You are under investigation for not intervening: what Art. 450 CP punishes

Art. 450.1 CP, placed among the offences against the administration of justice, punishes anyone who, being able to do so by immediate intervention and without risk to himself or to others, fails to prevent the commission of an offence affecting a person's life, physical integrity or health, liberty or sexual freedom.

It is an offence of pure omission: what is punished is not having caused anything, but not having done what the situation required. Four elements must all be present: one of the listed offences must be in the course of being committed; the person must have a real possibility of immediate intervention; that intervention must not create a risk to himself or to others; and, even so, he must fail to act. If any of them is missing, the conduct falls outside the provision.

Paragraph 2 adds a distinct and less demanding form: the same penalties apply to anyone who, being able to do so, fails to go to the authorities or their agents so that they may prevent one of those offences, where he has notice of its imminent or ongoing commission.

Who can commit it

Anyone can. Unlike commission by omission, Art. 450 CP does not require a position of guarantor or any prior relationship with the victim or with the source of danger: it is enough to be in the situation described and to be able to act. It is a duty of solidarity that the Code imposes on citizens generally.

What it does require is an effective capacity for immediate intervention. Proximity in time and place, the person's physical condition and the real availability of a means of preventing the offence are elements of the offence definition, not sentencing factors. Mere presence at the scene is not enough for a conviction: it must be proved that this particular person could have prevented the crime.

Where the person who fails to act is a public authority or official, the classification may shift to the provisions specific to them. Art. 408 CP punishes an authority or official who, in breach of the duties of his post, intentionally fails to promote the prosecution of offences of which he has notice, or of those responsible for them, with disqualification from public employment or office for six months to two years.

Which offences must be prevented

The list in Art. 450 CP is closed and is defined by the protected interest, not by the part of the Code in which the offence appears. The duty to intervene arises only in relation to offences affecting a person's life, physical integrity or health, liberty or sexual freedom.

The practical consequence is direct: witnessing without intervening a property offence, an offence against the public administration, a documentary forgery or a road safety offence is not covered by this provision. Nor is a failure to act in relation to an offence already completed, because at that point there is nothing left to prevent; that ground belongs, where applicable, to the offence of acting as an accessory after the fact.

The boundary is more debatable than it looks where the offence witnessed attacks several interests at once, or where an assault escalates: what begins as a property offence may turn into an attack on physical integrity. The moment at which the person could have intervened, and which offence was being committed then, is a question of evidence rather than of abstract classification.

This offence should not be confused with failure to assist (Art. 195 CP), which punishes failing to help someone who has already been harmed.

The limit of risk to oneself or to others

The provision requires that intervention was possible without risk to oneself or to others. Heroism is not demanded: no one is obliged to expose himself or anyone else. The standard applied is that of an average person in that position, with the information available at the time and not with what becomes known after the trial.

The presence of risk removes the duty of direct intervention but does not remove the duty to raise the alarm. That is the point of paragraph 2: a person who cannot intervene safely remains obliged to go to the authorities or their agents. A defence resting on risk alone therefore tends to fall short unless it also explains why no warning was given.

The form in Art. 450.2 CP: going to the authorities

Art. 450.2 CP imposes the same penalties on anyone who, being able to do so, fails to go to the authorities or their agents so that they may prevent one of the offences listed in the previous paragraph, where he has notice of its imminent or ongoing commission.

Three points define its scope. First, it requires notice of an imminent or ongoing commission, not a vague suspicion or a general fear. Second, the duty is discharged by going to the authorities, with no result required, so a warning ignored by the person receiving it does not prejudice the person who gave it. Third, the warning must be useful, that is, timely and with enough content to allow intervention; a warning given after the event does not satisfy the provision.

The penalties and the clause that moderates them

Art. 450.1 CP distinguishes according to the offence not prevented. Where it was an offence against life, the penalty is a prison sentence of six months to two years. In all other cases, a fine of six to twenty-four months. Paragraph 2 refers to those same penalties.

The provision also contains a proportionality rule that is often overlooked: where the offence not prevented would carry an equal or lesser penalty than the one laid down for the omission, the penalty imposed is one degree below that of the offence in question. This avoids the absurd result of punishing the person who failed to prevent more severely than the person who committed the crime.

Since the maximum penalty does not exceed five years, the limitation period is the general five-year period of Art. 131.1 CP, calculated under the general rules. And where a single incident gives rise to several classifications, the boundary is drawn under the rules on conflict of laws and concurrence of offences.

The difference from commission by omission (Art. 11 CP)

This is the most serious confusion because of its consequences. Art. 11 CP does not create any offence: it is the clause that allows a result offence to be attributed to a person who did not prevent it, where the failure to prevent, in breach of a special legal duty of the perpetrator, is equivalent under the meaning of the statute to causing it. The article itself identifies two sources of that duty: a specific legal or contractual obligation to act, or the fact that the person had created a source of risk to the protected interest by prior conduct.

The difference in treatment is enormous. Under Art. 11 CP a person answers for the result offence itself — homicide, bodily harm — as a principal, with its full penalty. Under Art. 450 CP a person answers for a free-standing offence of omission, with the far lower penalties described above. And the requirement separating the two routes is the position of guarantor: without it there can be no commission by omission, however serious the result.

The difference from failure to render assistance (Art. 195 CP) and from being an accessory

Art. 195.1 CP punishes with a fine of three to twelve months anyone who fails to assist a person who is helpless and in manifest and serious danger, where he could do so without risk to himself or to third parties. Paragraph 2 covers a person who, unable to give assistance himself, does not urgently seek help from others, and paragraph 3 raises the penalty to a prison sentence of six months to 18 months where the victim is in that position through an accident caused accidentally by the person who failed to assist, and to a prison sentence of six months to four years where the accident was due to negligence. This is the provision that typically appears in hit-and-run situations.

There are three differences from Art. 450 CP. The trigger: Art. 195 CP requires a person in danger, whatever its origin, while Art. 450 CP requires an offence from a closed list to be in the course of commission. The protected interest: solidarity towards the person in one case, the working of the administration of justice in the other. And the content of the duty: assisting someone already in danger, as against preventing the offence from being committed at all.

As against the offence under Art. 451 CP, the boundary is temporal: there the intervention comes after the offence has been carried out, and it is punished with a prison sentence of six months to three years, subject to the cap in Art. 452 CP. One asymmetry is worth remembering: Art. 454 CP exempts from punishment those who act as accessories for certain relatives, but Art. 450 CP contains no equivalent excuse.

What the defence looks at

• The real possibility of intervening. Distance, time available, physical condition and means: without an effective capacity to prevent the offence, the definition is not met.
• The list of offences. Checking that the offence witnessed affected life, physical integrity or health, liberty or sexual freedom; outside that list the conduct is not covered.
• Risk. Assessed on the information the person had at the time, not on the later reconstruction.
• Knowledge. Under paragraph 2, the prosecution must prove actual notice of an imminent or ongoing commission, not a suspicion.
• The position of guarantor. Where the prosecution charges the result offence through Art. 11 CP, disputing the existence of the special duty brings the case back to a far lower sentencing range.
• The proportionality clause. Checking whether the offence not prevented carried an equal or lesser penalty, because the penalty is then one degree lower.

If you are under investigation for failing to prevent an offence or for failing to alert the authorities, the analysis begins by reconstructing precisely what you were able to do at that particular moment. You can contact us at +34 91 078 65 74.