Preventive measures

What are preventive measures?

Preventive measures are legal instruments used during criminal proceedings to secure the proper course of the case and, in some situations, to prevent a suspect or defendant from committing another serious offence. They are not a penalty. Their function is procedural – they are meant to protect evidence, ensure the person’s availability to the authorities, and reduce risks such as absconding, obstructing proceedings, or unlawfully influencing witnesses.

In practice, preventive measures may be applied at different stages of criminal proceedings, provided that the statutory conditions are met. Their use usually requires a high probability that a person has committed an offence, combined with additional circumstances showing that a measure is necessary. Depending on the severity of the case and the level of risk identified by the prosecuting authorities or the court, the measure may range from relatively mild restrictions to pre-trial detention.

Although preventive measures serve a legitimate procedural purpose, they interfere with individual rights to varying degrees. For that reason, they should be applied proportionately and only when less restrictive solutions are insufficient. In Polish criminal procedure, pre-trial detention should be used only if another preventive measure would not be sufficient.

What types of preventive measures can be applied?

Preventive measures may take custodial or non-custodial form. The most severe measure is pre-trial detention, which involves deprivation of liberty for a specified period, subject to judicial control and statutory time limits. Because of its intrusive nature, it is treated as an exceptional solution and should not be used automatically.

Non-custodial preventive measures include, among others, police supervision, bail, a prohibition on leaving the country, including passport retention, an order to refrain from contacting specific persons, and an order to leave premises shared with the injured party in certain cases. Depending on the circumstances, these measures may be combined. Their content should correspond to the procedural risks identified in the case.

The exact catalogue and requirements depend on the applicable procedural rules and the nature of the allegations. In practical terms, the choice of measure is influenced by factors such as the seriousness of the alleged offence, the suspect’s prior conduct, personal and family situation, ties to the country, previous attempts to evade justice, and the risk of witness tampering or evidence destruction.

When can preventive measures be used?

Preventive measures are typically considered when there is concern that, without them, the proceedings may be frustrated or significantly hindered. Common grounds include a risk that the suspect will abscond, hide, pressure witnesses, coordinate testimony with others, destroy evidence, or otherwise obstruct the investigation. In some cases, the authorities may also rely on the gravity of the potential penalty as an argument supporting the existence of procedural risk, although this factor alone should not replace an individual assessment.

Another important context is the risk of reoffending, especially where the allegations concern offences against life, health, or public safety, or repeated criminal conduct. In such cases, preventive measures may also serve a protective function. Even then, however, the measure must remain grounded in procedural law and satisfy the principles of necessity and proportionality.

There may be interpretative differences in practice as to how strictly the courts should evaluate the evidentiary threshold and the existence of procedural grounds. A restrictive approach emphasises the exceptional character of custodial measures and the need for concrete facts. A broader approach gives more weight to the seriousness of the charges and the anticipated penalty. From a defence perspective, this distinction can be important when challenging the application or extension of a measure.

Why does early legal assistance matter?

Preventive measures can have immediate and serious consequences for private life, employment, business continuity, reputation, and family relations. A prompt legal assessment may help verify whether the statutory grounds are actually met, whether the authorities have relied on sufficient evidence, and whether a less restrictive measure could be proposed instead. This may be relevant both before a court hearing and at the stage of appealing an already imposed measure.

Early consultation with a lawyer can also help avoid procedural mistakes, missed deadlines, unnecessary statements, or strategic decisions that later weaken the defence. In business-related cases, quick action may reduce operational disruption, limit exposure to further liability, and protect access to documents, communication channels, and key personnel. In personal matters, it may be decisive for preserving liberty, contact with family, and the ability to work.

How can a law firm assist in matters involving preventive measures?

Legal support in cases concerning preventive measures may include, in particular:

assessing whether the legal prerequisites for a preventive measure are satisfied,
representing a suspect or defendant during questioning and court hearings,
preparing arguments against pre-trial detention or in favour of a non-custodial measure,
drafting appeals and applications for amendment or revocation of a measure,
advising on compliance with imposed obligations, including police supervision or travel restrictions,
supporting injured parties in cases where protective measures may be relevant,
assisting companies and managers when criminal proceedings affect business operations or internal governance.

If preventive measures have been applied or are being considered in a criminal case, a timely legal review of the situation is often critical. Need legal assistance? Contact us.

Preventive measures