Kuwait Court of Cassation principle number 4121

A commercial obligation for a sum of money. When its subject matter is of a known amount at its inception, even if the debtor disputes its amount. - Statutory interest is compensation for delay in fulfilling an obligation to pay a sum of money. When it accrues. As soon as the debt falls due, without proof of damage or an agreement on such interest; the debtor is not exempted from it except by an agreement or custom so providing.