[IDEM libro tertio responsorum. ] §3.5.31.prFideiussor imperitia lapsus alterius quoque contractus, qui personam eius non contingebat, pignora uel hypothecas suscepit et utramque pecuniam creditori soluit, existimans indemnitati suae confusis praediis consuli posse.
[IDEM, Responses, Book III] A guarantor, falling into error through ignorance, took over the pledges or mortgages of another contract as well, which did not concern his person, and paid both sums of money to the creditor, thinking that his own indemnity could be provided for by merging the estates.
ob eas res iudicio mandati frustra conuenietur et ipse debitorem frustra conueniet, negotiorum autem gestorum actio utrique necessaria erit: in qua lite culpam aestimari satis est, non etiam casum, quia praedo fideiussor non uidetur.
Because of these matters, he will be sued in vain by an action on mandate, and he himself will sue the debtor in vain, but an action for the management of affairs will be necessary for both: in which lawsuit it is sufficient for negligence to be assessed, and not also fortuitous event, since the guarantor is not deemed a plunderer.
creditor ob id factum ad restituendum iudicio, quod de pignore dato redditur, cum uideatur ius suum uendidisse, non tenebitur.
The creditor, on account of this act, will not be liable to make restitution by the action that is brought for a given pledge, since he is deemed to have sold his right.
§3.5.31.1Ignorante uirgine mater a sponso filiae res donatas suscepit: quia mandati uel depositi cessat actio, negotiorum gestorum agitur.
Without the knowledge of the young woman, her mother received things given as a gift by her daughter's betrothed; because an action on mandate or deposit is not available, an action for the management of affairs is brought.