It is not necessary for the parties to have reached an agreement on all major points for a contract to have come into existence under Dutch law. The Dutch courts will look at 'substance over form'. This means that the name or form of the document is not decisive. It is, therefore, possible under Dutch law that documents produced during the negotiations will individually, or collectively with other communications, have contractual force. A Dutch court may use default provisions of Dutch contract law and the principle of reasonableness and fairness to fill in the gaps of the agreement.