[ULPIANUS libro trigesimo quarto ad Sabinum. ] §45.1.20.prHuiusmodi stipulationes non sunt inutiles: 'quod tibi Titius debet, cum debitor esse desierit, dare spondes?' nam ualet stipulatio quasi sub quauis alia condicione concepta.
[ULPIANUS, in the thirty-fourth book on Sabinus.] Stipulations of this kind are not void: 'Do you promise to give what Titius owes you, when he ceases to be a debtor?' For the stipulation is valid, just as if it were framed under any other condition.