[PAPINIANUS libro secundo quaestionum. ] §12.6.54.prEx his omnibus causis, quae iure non ualuerunt uel non habuerunt effectum, secuta per errorem solutione condictioni locus erit.
[PAPINIANUS, in the second book of Questions.] In all these cases which were not valid in law or did not have effect, if payment followed by mistake, there will be room for a condictio.