According to the doctrine of optional choice of law, civil courts ignore the foreign elements of a multistate case and apply their own substantive law, if neither of the parties has asserted that foreign law is applicable. The courts do not apply the choice of law rules of their own motion. The principal argument normally raised in favour of this doctrine is that it would serve the quality of the adjudication. The application of foreign law is a difficult task since, usually, the courts (and the local lawyers) lack the necessary expertise in applying another country's laws. Under an optional choice of law the problematic application of foreign law can be omitted if neither of the parties has invoked that law. In most European countries the doctrine has not been adopted. This article examines the question whether or not the introduction of an optional choice of law would be desirable in the Netherlands. It is argued that a duty for the courts to raise the choice of law issue ex officio is more in tune with the present developments in Dutch law regarding the respective roles of the parties and the judge in civil litigation. Moreover, there are other solutions available and conceivable to deal with the problems concerning the application of foreign law.