The Supreme Court decides: The law presumes that a person takes ordinary care of their concerns and that private transactions have been fair and regular. Hence, negligence cannot be presumed but must be proven.
Settled is the rule that in actions based on quasi-delict, it is incumbent upon the plaintiff to prove the presence of the foregoing elements by preponderance of evidence. They cannot rely on mere allegations but must present such evidence more convincing as worthy of belief than that which is offered in opposition thereto.
In this case, however, while the death certificate shows the damage or injury sustained by Adelaida, specifically, cerebral hemorrhage and severe hypertension, the totality of the evidence failed to establish the second and third elements of a quasi-delict.