[PAPINIANUS libro octauo quaestionum. ] §13.5.9.prTitius tamen indebiti condicione tenebitur, ut quod ei perperam solutum est ei qui soluit reddatur.
[PAPINIANUS, from the eighth book of Questions.] Titius will, however, be held liable to an action for recovery of what was not owed, so that what was paid to him by mistake may be restored to the one who paid.