[GAIUS ad edictum praetoris urbani titulo de liberali causa. ] §40.12.4.prSed tunc patrono conceditur pro libertate liberti litigare, si eo ignorante libertus uenire se passus est.
[GAIUS on the Edict of the Urban Praetor, under the title "On Liberty Cases".] But it is only granted to a patron to litigate on behalf of the freedom of his freedman if, while he was ignorant of it, the freedman allowed himself to be sold.