Kuwait Court of Cassation principle number 3501

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 sum of money of a known amount when it arises. Failure of that condition. Its effect. Interest accrues from the date of the final judgment. - The subject matter of an obligation whose amount is known when it arises. Its meaning. An example concerning carriage charges that were specified and of a known amount when they arose.