[SCAEUOLA libro primo responsorum. ] §22.1.13.prQui semisses usuras promissit, per multos annos minores praestitit: heres creditoris semisses petit.
A person who had promised interest at the rate of six percent paid a lower rate for many years; the heir of the creditor demands the six percent.
cum per debitorem non steterit, quo minus minores soluat, quaero an exceptio doli uel pacti obstet.
Since it was not due to the debtor's fault that he paid the lower rate, I ask whether the exception of fraud or of agreement is an obstacle.
respondi, si exsoluendis ex more usuris per tanta tempora mora per debitorem non fuit, posse secundum ea, quae proponerentur obstare exceptionem.
I answered that if, in paying interest according to custom, there was no default on the part of the debtor for so long a time, the exception could, according to the facts presented, stand in the way.
§22.1.13.1Quaesitum est, an iudicio negotiorum gestorum uel mandati pro pecunia otiosa usuras praestare debeat, cum dominus nullam pecuniam faenerauit.
The question was asked whether, in an action on business management or on mandate, one ought to pay interest for idle money, when the owner himself had lent out no money.
respondit, si eam pecuniam positam habuisset idque ex consuetudine mandantis fecisset, non debere quicquam usurarum nomine praestare.
He answered that if he had kept that money deposited, and had done so in accordance with the custom of the mandator, he ought not to pay anything under the head of interest.