[PAULUS libro decimo ad Sabinum. ] §12.6.15.prIndebiti soluti condictio naturalis est et ideo etiam quod rei solutae accessit, uenit in condictionem, ut puta partus qui ex ancilla natus sit uel quod alluuione accessit: immo et fructus, quos is cui solutum est bona fide percepit, in condictionem uenient.
[PAULUS, On Sabinus, Book 10.] The action for recovery of an undue payment is natural, and therefore also whatever has acceded to the thing paid comes into the recovery, as for example, the offspring born of a female slave, or what has acceded by alluvion; nay, even the fruits which he to whom payment was made has gathered in good faith will come into the recovery.
§12.6.15.1Sed et si nummi alieni dati sint, condictio competet, ut uel possessio eorum reddatur: quemadmodum si falso existimans possessionem me tibi debere alicuius rei tradidissem, condicerem.
But even if the money of another has been given, the action for recovery will lie, so that at least the possession of it may be restored; just as if, falsely thinking that I owed you the possession of some thing, I had delivered it, I would bring an action for recovery.
sed et si possessionem tuam fecissem ita, ut tibi per longi temporis praescriptionem auocari non possit, etiam sic recte tecum per indebitam condictionem agerem.
But even if I had made the possession yours in such a way that it cannot be taken away from you by long-term prescription, even so I would rightly sue you by the action for recovery of what is not due.
§12.6.15.2Sed et si usus fructus in re soluta alienus sit, deducto usu fructu a te condicam.
But also if the usufruct in the thing paid belongs to another, I shall bring my action for recovery against you, deducting the usufruct.