Last year, Insights published an article by Michael Bennett on cases in which the Dutch tax authorities used Article 10a of Dutch tax law and the concept of fraus legis to challenge deductions for interest expense on certain internal borrowings. The article pointed out that many grey areas and interpretative issues remained. Since that article was published, the Dutch Supreme Court, the Advocate General for the C.J.E.U., and the Advocate General of the Netherlands have issued opinions on three separate cases. In his article in this edition of Insights, Michael Bennett reviews the opinions and points out the ongoing uncertainty surrounding the precise scope of Article 10a and its interaction with fraus legis.