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..."