Conclusive Proof, May Presume, Shall Presume Under BSA

 1. Conclusive Proof

 Conclusive presumptions are based not only on logic but also on the belief that certain presumptions are necessary for the welfare of society. The law grants full authority in these cases, meaning these presumptions cannot be challenged, even if the underlying assumptions are questioned. Simply put: “If one fact is proven, there is no need to prove other related facts.” According to Section 2(1)(b) of the BSA, when one fact is declared by law to be conclusive proof of another, the court must regard the second fact as proven and cannot allow any evidence to disprove it.

2. May Presume

While deciding a case, a court normally cannot rely on any fact unless it is proved according to the rules laid down in the Bharatiya Sakshya Adhiniyam.
However, the Adhiniyam makes an exception by allowing courts to accept certain facts without formal proof. These are called presumptions.

The word “presumption” means something that is taken for granted. In the law of evidence, it refers to an inference that a court draws about the existence or non-existence of a fact based on logic and probability.

When the law says that the court “may presume” a fact, it gives the court discretion. The court can:

      accept the fact as proved, or

      Ask for further evidence, depending on the circumstances.

Such a presumption is not compulsory and not conclusive. It can be rebutted. This is not a presumption juris et de jure (a conclusive presumption of law). The court is free to presume the fact or refuse to do so.

For example, Section 92 of the Bharatiya Sakshya Adhiniyam provides that if a document is 30 years old and comes from proper custody, the court may presume that it was written and signed by the person it claims to be from.
In such a case, the court may read the document in evidence without proof, but it can still demand proof if it thinks fit.

According to Section 2(1)(h):

When the court may presume a fact, it may either treat it as proved unless it is disproved or may ask for proof.

In legal interpretation, the word “may” is directory, meaning it gives discretion. It does not impose a duty.

3. Shall Presume

When the law uses the words “shall presume,” the situation is different.

According to Section 2(1)(l):

Whenever the Adhiniyam directs that the court shall presume a fact, the court must regard that fact as proved unless and until it is disproved.

Here, the court has no discretion. It must presume the fact to be true at the beginning. However, the opposite party is allowed to disprove it. If the opposite party succeeds, the presumption will not stand.

For example, Section 91 of the Bharatiya Sakshya Adhiniyam states that the court shall presume that a document, which was demanded by notice but not produced, was properly attested, stamped, and executed as required by law.

In such cases, the law itself decides:

      the nature of evidence required,

      the minimum proof needed to establish a prima facie case, and

      shifts the burden of disproving the fact onto the opposite party.

If no contrary evidence is given, the court is bound to decide in favour of the presumption.

Presumptions help courts save time by avoiding unnecessary proof where the law already provides guidance.
Presumptions under “may presume” are discretionary, while those under “shall presume” are mandatory—though both can generally be rebutted unless expressly made conclusive..

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