What is a mistake of fact?
A mistake of fact occurs when a person acts under an incorrect understanding of circumstances that are relevant to the legal assessment of their conduct. The person may be unaware of a fact, misunderstand a situation, or assume that a particular circumstance exists when it does not. Whether such a mistake affects criminal liability depends on the type of offence, the person’s state of mind, and the legal system governing the case.
In criminal law, a mistake of fact is particularly important because many offences require intent. A person generally acts intentionally when they are aware of the relevant circumstances and want to commit the prohibited act, or at least accept the possibility of doing so. If a person is mistaken about a factual element of an offence, this may exclude intent. However, it does not automatically exclude all liability, as negligence may still be relevant where the law penalises negligent conduct.
Under Polish criminal law, the issue is addressed primarily by Article 28 of the Criminal Code. A person who is in error as to a circumstance constituting an element of a prohibited act does not commit the act intentionally. If the statutory conditions for negligent liability are met and the relevant offence is punishable when committed through negligence, liability for an unintentional offence may still arise.
How does a mistake of fact operate in practice?
A mistake of fact may concern many different elements of a criminal offence. It can relate to the identity of a person, ownership of property, consent, the age of another person, the existence of danger, or the nature of an object or document. The key issue is whether the mistaken circumstance forms part of the statutory description of the offence or otherwise affects the person’s criminal responsibility.
For example, a person may take an item believing in good faith that it belongs to them. If that belief is credible, it may exclude the intent required for theft. Similarly, a person may make a statement believing it to be true, which can be relevant in cases involving false accusations, perjury, or the use of forged documents. Each case requires a detailed analysis of what the person knew, believed, and could reasonably have established at the time of acting.
A mistake of fact should be distinguished from a mistake of law. A mistake of law concerns an incorrect understanding of whether conduct is prohibited or what legal consequences it may have. A mistake of fact concerns the actual circumstances of an event. In practice, both issues may arise together, but they are assessed under different legal rules.
When can a mistake of fact be relevant?
Legal advice may be needed whenever a criminal allegation depends on what a person knew about a situation. This may apply to allegations involving theft, fraud, forgery, threats, assault, property damage, offences against the administration of justice, or offences connected with business activity.
For private individuals, a mistake of fact may be relevant where a conflict has arisen from a misunderstanding of ownership, consent, identity, communication, or the circumstances of an incident. For entrepreneurs and company representatives, it may matter in cases involving contracts, financial documents, tax matters, corporate decisions, internal procedures, or representations made to public authorities.
It is not enough simply to claim that a person did not know certain facts. The explanation must be assessed against available evidence, including correspondence, documents, witness statements, recordings, expert opinions, and the person’s conduct before and after the event. The prosecution may argue that the person consciously ignored obvious circumstances or accepted the risk that the relevant facts were different.
A prompt consultation with a lawyer can help identify whether the facts may exclude intent, support a particular defence strategy, or reduce the risk of an incorrect statement being made during criminal proceedings. Early legal analysis may also assist in securing evidence that confirms the person’s understanding of the situation at the relevant time.
Legal assistance concerning mistake of fact
Legal support in matters involving a mistake of fact may include in particular:
- assessing whether the alleged conduct required intent;
- analysing the factual circumstances relevant to criminal liability;
- reviewing documents, correspondence, recordings, and witness evidence;
- preparing explanations and procedural submissions;
- representing a client during investigations and court proceedings;
- identifying whether negligent liability may still arise;
- advising businesses on procedures intended to reduce criminal and compliance risks.
Need legal assistance concerning a mistake of fact? Contact us.