From: "Zev Sero" <zev at sero.name> > Because there is no prohibition on discounts for paying early. The > prohibition is only on surcharges for paying late. Is there a source for this? It sounds to me like this is a hiluk between ribbis d'orayssa and ribbis d'rabbanan. See Hochmath Adam 131:3,9. Compare YD 160:6. David Riceman