[IAUOLENUS libro octauo ex Cassio. ] §3.5.27.prSi quis mandatu Titii negotia Seii gessit, Titio mandati tenetur lisque aestimari debet, quanto Seii et Titii interest: Titii autem interest quantum is Seio praestare debet, cui uel mandati uel negotiorum gestorum nomine obligatus est.
[JAVOLENUS, From Cassius, Book VIII] anyone has managed the affairs of Seius by mandate of Titius, he is liable to Titius on the mandate, and the suit ought to be estimated at how much it concerns Seius and Titius. Moreover, the interest of Titius is as much as he is obliged to perform to Seius, to whom he is bound either under the name of mandate or of management of affairs.
Titio autem actio competit cum eo, cui mandauit aliena negotia gerenda, et antequam ipse quicquam domino praestet, quia id ei abesse uidetur in quo obligatus est.
Furthermore, Titius has an action against the person to whom he mandated the management of another's affairs even before he himself performs anything to the principal, Seius, because that in which he is bound is deemed to be a loss to him.