Also known as: onuses · onus probandi · burden of proof
Written by attorneys · grounded in primary & secondary sources — see below
A burden or obligation, especially the duty to prove a particular fact or proposition in litigation.
Olga O'Neill was struck by a rock while hiking near two quarries operated by separate companies. Both companies had been blasting negligently that day, but Olga could not identify which blast caused her injury. The onus shifted to each company to prove its conduct did not cause the harm.
Opal Okoro petitioned to probate her uncle's will while a cousin sought a declaration of intestacy. Opal bore the onus of establishing due execution. The cousin bore the onus of proving lack of capacity or undue influence.
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Odin Obeng suffered lung damage after exposure to asbestos from two different manufacturers over many years. One manufacturer sought to limit its liability by showing the harm could be apportioned. The onus fell on that manufacturer to prove the proper division of damages.
Orlando Okafor challenged a state military academy's male-only admissions policy. The state bore the onus of supplying an exceedingly persuasive justification that the classification substantially advanced an important governmental objective.
Odilia Okamura sued a chemical plant claiming its emissions caused her respiratory illness. Because only one actor's conduct was at issue, the onus remained on Odilia to prove that the plant's emissions were the cause in fact of her harm.
Olive Okafor and other college students challenged a village ordinance limiting occupancy to two unrelated persons. The Court applied rational basis review and upheld the ordinance, finding the measure did not improperly burden associational rights.
It refers to a burden or obligation, most commonly the burden of proof that a party must carry on a particular issue.
The onus shifts when two or more defendants acted tortiously, the plaintiff suffered a single harm, and the plaintiff cannot identify which defendant caused the injury.
Proponents bear the onus of proving due execution. Contestants bear the onus of proving lack of capacity, undue influence, or revocation.
The government bears the onus of providing an exceedingly persuasive justification that the classification is substantially related to an important objective.
Yes, unless an exception such as alternative liability or apportionment applies, in which case the onus may shift to the defendants.
…or overbroad." A physician's abortion conviction was affirmed. In Thompson , n. 2, the court observed that any issue as to the burden of proof under the exemption of Art. 1196 "is not before us." But see Veevers v. State , 172 Tex. Cr. R. 162, 168-169, 354 S. W. 2d 161, 166-167 (1962). Cf. United States v. Vuitch , 402 U. S.…