Kuwait Court of Cassation principle number 3378

Commercial debts. The general rule is that default interest accrues on them as soon as they fall due. Its condition. Their subject matter must be a monetary sum of a known amount at its inception. Absence thereof. Its effect. Interest accrues from the date of the final judgment. - The subject matter of an obligation of a known amount at its inception. Its nature. Example of carriage charges specified and known in amount at the inception of the obligation to pay them.