Question

What do you mean by 'onus probandi'?

• A. Actual evidence, documents, or witnesses presented to substantiate that claim.
• B. "The fact to be proved" or the "ultimate fact" that needs to be established in a legal case, such as the core elements of a crime or a cause of action.
• C. 'Burden of proof' which places the responsibility on the party making an affirmative claim to substantiate it with evidence.
• D. The prosecution in a criminal case must prove beyond a reasonable doubt, not only a criminal act, but also a certain level of a guilty mind (mens rea), specified in the criminal statute.

Hint:

"Onus Probandi" = Burden of Proof. If you allege it, you must prove it—this is the fundamental rule of evidence in both civil and criminal law.

Answer 1

The Correct Option is C

Latin legal maxims often compress an entire rule of procedure into two or three words, and onus probandi is one of the clearest examples. Taken apart, onus simply means a load or a burden, and probandi comes from the verb meaning to prove. Put together, the phrase is literally "the burden of proving."

In practical courtroom terms, this burden decides who has to do the work of convincing the judge that a fact is true. The general rule is that whoever affirmatively asserts a fact, rather than merely denying one, carries the onus of proving it; a person cannot expect the court to simply accept a claim without supporting evidence, and equally cannot expect the other side to disprove something it never asserted.

This is different from the evidence itself, which is just the material, documents, or testimony, used to discharge that burden, and different again from the "fact to be proved" or factum probandum, which is the specific fact in issue rather than the duty to establish it. It is also narrower than the criminal-law standard of proving both the act and the guilty mind beyond reasonable doubt, which is one particular, heightened application of a burden of proof in a specific context, not the general meaning of the term.

So onus probandi simply means the burden of proof, the responsibility resting on the party making a claim to support it with evidence.

Answer 2

Another way to settle this is to ask, for each option, whether it is describing a duty, a fact, or a standard, since "onus probandi" specifically names a duty and nothing else.

1. Actual evidence, documents, or witnesses: This is the material a party gathers and presents in court. It answers "what do I bring to court," not "whose job is it to bring something," so it cannot be the meaning of a phrase about who bears an obligation.
2. The fact to be proved or the ultimate fact: This answers "what am I trying to establish," the destination of the proof exercise, not the duty of getting there. It names a target, not an obligation, so it is a different concept from onus probandi.
3. Burden of proof on the party making an affirmative claim: This answers "whose job is it to prove something," which is exactly what a duty-naming phrase like onus probandi is meant to capture. It correctly identifies both that there is an obligation and who holds it.
4. Prosecution must prove the act and a guilty mind beyond reasonable doubt: This answers "how much and what must be shown" in one particular setting, criminal trials, rather than defining the general duty itself. It is a specific standard applied under a burden of proof, not the definition of the phrase.

Sorting the options by whether they describe material, a target fact, a duty, or a standard shows that only one option actually names the duty that onus probandi refers to.

Therefore, the correct answer is 'Burden of proof' which places the responsibility on the party making an affirmative claim to substantiate it with evidence.