This article envisages the jurisdictional problems that creditors encounter in international arbitration, when their contractual rights are breached as a result of the tortious interference of a third non-signatory in a contract that contains an arbitration clause. This frequently occurs when the non-signatory colludes with the debtor to breach the contract. Hence, it is assessed whether this type of dispute falls within the scope of a typical arbitration model clause and whether the extension of the arbitration clause to non-signatories is feasible in this case. To this end, theories on the extension of the arbitration clause already admitted in the international arbitration practice and other considerations have been taken into account.