[PAULUS libro tertio quaestionum. ] §13.7.41.prRem alienam pignori dedisti, deinde dominus rei eius esse coepisti: datur utilis actio pigneraticia creditori.
[PAULUS, in his Third Book of Questions.] If you gave another's property as a pledge, and then you became the owner of that property, a beneficial pledge action is granted to the creditor.
non est idem dicendum, si ego Titio, qui rem meam obligauerat sine mea uoluntate, heres extitero: hoc enim modo pignoris persecutio concedenda non est creditori, nec utique sufficit ad conpetendam utilem pigneraticiam actionem eundem esse dominum, qui etiam pecuniam debet.
The same is not to be said if I should become the heir to Titius, who had pledged my property without my consent; for in this case, the pursuit of the pledge must not be granted to the creditor, nor indeed is it sufficient for the beneficial pledge action to be competent that the same person who also owes the money is the owner.
sed si conuenisset de pignore, ut ex suo mendacio arguatur, improbe resistit, quo minus utilis actio moueatur.
But if there had been an agreement regarding the pledge, so that he may be convicted of his own deception, he dishonestly resists the bringing of the beneficial action.