T N Lakshmaiah Vs State of Karnataka (2002) 1 SCC 219

Hon’ble Supreme Court of India observed as under "Under the Evidence Act, the onus of proving any of the exceptions mentioned in the Chapter lies on the accused though the requisite standard of proof is not the same as expected from the prosecution. It is sufficient if an accused is able to bring his case within the ambit of any of the general exceptions by the standard of preponderance of probabilities, as a result of which he may succeed not because that he proves his case to the hilt but because the version given by him casts a doubt on the prosecution case.

In State of M P Vs Ahmadull AIR 1961 SC 998, this Court held that the burden of proof that the mental condition of the accused was, at the crucial point of time, such as is described by the section, lies on the accused who claims the benefit of this exemption vide Section 105 of the Evidence Act [Illustration (a)]. The settled position of law is that every man is presumed to be sane and to possess a sufficient degree of reason to be responsible for his acts unless the contrary is proved. Mere ipse dixit of the accused is not enough for availing of the benefit of the exceptions under Chapter IV.
In a case where the exception under Section 84 of the Indian Penal Code is claimed, the court has to consider whether, at the time of commission of the offence, the accused, by reason of unsoundness of mind, was incapable of knowing the nature of the act or that he is doing what is either wrong or contrary to law. The entire conduct of the accused, from the time of the commission of the offence up to the time the sessions proceedings commenced, is relevant for the purpose of ascertaining as to whether plea raised was genuine, bona fide or an afterthought."

U.P. v. Gobardhan Lal (2004) 11 SCC 402

allegations of mala-fides must inspire confidence of the Court and ought not to be entertained on the mere asking of it or on consideration borne out of conjectures or surmises and except for strong and convincing reasons, no interference would ordinarily be made with an order of transfer. That the burden of proving mala-fides is on a person leveling such allegations and the burden is heavy, admits of no legal ambiguity. Mere assertion or bald statement is not enough to discharge the heavy burden that the law imposes upon the person leveling allegations of mala-fides; it must be supported by requisite materials.

State of Rajasthan Vs. Naresh @ Ram Naresh Cr.A. No. 837 of 2002 Decided by supreme court on: 26.08.2009

An order of acquittal should not be lightly interfered with even if the court believes that there is some evidence pointing out the finger towards the accused. The view that is taken by the High Court is found to be a plausible view, and therefore, the benefit must always go to the accused and not to the prosecution. If the prosecution wants to prove the fact, the same must be proved by leading evidence, which is reliable and trustworthy, which pinpoints and conclusively proves the guilt of the accused.

Raghavamma & Anr. v. Chenchamma & Anr., AIR 1964 SC 136, there is an essential distinction between burden of proof and onus of proof : burden of proof lies upon a person who has to prove the fact and which never shifts. Onus of proof shifts. Such a shifting of onus is a continuous process in the evaluation of evidence. In our opinion, in a suit for possession based on title once the plaintiff has been able to create a high degree of probability so as to shift the onus on the defendant it is for the defendant to discharge his onus and in the absence thereof the burden of proof lying on the plaintiff shall be held to have been discharged so as to amount to proof of the plaintiff's title.

Evidence- sec 100, 101 burden of proof Krishna Mohan Kul @ Nani Charan Kul & Anr. v. Pratima Maity & Ors., AIR 2003 SC 4351 The question of burden of proof was gone into after the parties had adduced evidence. It was brought on record that the witnesses whose names appeared in the impugned deed and which was said to have been created to grab the property of the plaintiffs were not in existence. The question as regards oblique motive in execution of the deed of settlement was gone into by the Court. The executant was more than 100 years of age at the time of alleged registration of the deed in question. He was paralytic and furthermore his mental and physical condition was not in order. He was also completely bed-ridden and though his left thumb impression was taken, there was no witness who could substantiate that he had put his thumb impression. It was on the aforementioned facts, Supreme Court opined :- "12...The onus to prove the validity of the deed of settlement was on the defendant No. 1. When fraud, misrepresentation or undue influence is alleged by a party in a suit, normally, the burden is on him to prove such fraud, undue influence or misrepresentation. But, when a person is in a fiduciary relationship with another and the latter is in a position of active confidence the burden of proving the absence of fraud, misrepresentation or undue influence is upon the person, in the dominating position, he has to prove that there was fair play in the transaction and that the apparent is the real, in other words, that the transaction is genuine and bona fide. In such a case the burden of proving the good faith of the transaction is thrown upon the dominant party, that is to say, the party who is in a position of active confidence. A person standing in a fiduciary relation to another has a duty to protect the interest given to his care and the Court watches with jealously all transactions between such persons so that the protector may not use his influence or the confidence to his advantage. When the party complaining shows such relation, the law presumes everything against the transaction and the onus is cast upon the person holding the position of confidence or trust to show that the transaction is perfectly fair and reasonable, that no advantage has been taken of his position..

Evidence- sec 100, 101 burden of proof Krishna Mohan Kul @ Nani Charan Kul & Anr. v. Pratima Maity & Ors., AIR 2003 SC 4351 The question of burden of proof was gone into after the parties had adduced evidence. It was brought on record that the witnesses whose names appeared in the impugned deed and which was said to have been created to grab the property of the plaintiffs were not in existence. The question as regards oblique motive in execution of the deed of settlement was gone into by the Court. The executant was more than 100 years of age at the time of alleged registration of the deed in question. He was paralytic and furthermore his mental and physical condition was not in order. He was also completely bed-ridden and though his left thumb impression was taken, there was no witness who could substantiate that he had put his thumb impression. It was on the aforementioned facts, Supreme Court opined :- "12...The onus to prove the validity of the deed of settlement was on the defendant No. 1. When fraud, misrepresentation or undue influence is alleged by a party in a suit, normally, the burden is on him to prove such fraud, undue influence or misrepresentation. But, when a person is in a fiduciary relationship with another and the latter is in a position of active confidence the burden of proving the absence of fraud, misrepresentation or undue influence is upon the person, in the dominating position, he has to prove that there was fair play in the transaction and that the apparent is the real, in other words, that the transaction is genuine and bona fide. In such a case the burden of proving the good faith of the transaction is thrown upon the dominant party, that is to say, the party who is in a position of active confidence. A person standing in a fiduciary relation to another has a duty to protect the interest given to his care and the Court watches with jealously all transactions between such persons so that the protector may not use his influence or the confidence to his advantage. When the party complaining shows such relation, the law presumes everything against the transaction and the onus is cast upon the person holding the position of confidence or trust to show that the transaction is perfectly fair and reasonable, that no advantage has been taken of his position..."