[POMPONIUS libro nono ad Sabinum. ] §18.1.16.prSuae rei emptio non ualet, siue sciens siue ignorans emi: sed si ignorans emi, quod soluero repetere potero, quia nulla obligatio fuit.
[POMPONIUS, in the ninth book on Sabinus.] The purchase of one's own property is invalid, whether I bought it knowingly or in ignorance; but if I bought it in ignorance, I will be able to recover what I have paid, because no obligation existed.
§18.1.16.1Nec tamen emptioni obstat, si in ea re usus fructus dumtaxat ementis sit:
However, it does not stand in the way of a purchase if only the usufruct in that property belongs to the buyer.