[IULIANUS libro octauo digestorum. ] §12.7.3.prQui sine causa obligantur, incerti condictione consequi possunt ut liberentur: nec refert, omnem quis obligationem sine causa suscipiat an maiorem quam suscipere eum oportuerit, nisi quod alias condictione id agitur, ut omni obligatione liberetur, alias ut exoneretur: ueluti qui decem promisit, nam si quidem nullam causam promittendi habuit, incerti condictione consequitur, ut tota stipulatio accepto fiat, at si, cum quinque promittere deberet, decem promisit, incerti eonsequetur, ut quinque liberetur.
[JULIANUS, in his eighth book of the Digests.] Those who are bound without cause can by a condictio of an uncertain thing obtain their release; nor does it matter whether a person undertakes the entire obligation without cause or a greater one than he ought to have undertaken, except that in the one case the object of the condictio is to be released from the entire obligation, in the other to be relieved of a part: for example, one who has promised ten; for if indeed he had no cause for promising, he obtains by the condictio of an uncertain thing that the entire stipulation is discharged by formal release; but if, when he ought to have promised five, he promised ten, he will obtain that he is released to the extent of five.