[MARCIANUS libro sexto institutionum. ] §22.3.21.prUerius esse existimo ipsum qui agit, id est legatarium, probare oportere scisse alienam rem uel obligatam legare defunctum, non heredem probare oportere ignorasse alienam uel obligatam, quia semper necessitas probandi incumbit illi qui agit.
[MARCIANUS, in the sixth book of the Institutions.] I think it is more correct that the person who brings the action, that is, the legatee, must prove that the deceased knew he was bequeathing someone else's property or property that was pledged, and not that the heir must prove that [the deceased] was ignorant that it was someone else's or pledged, because the burden of proof always lies on the person who brings the action.