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Frans Sonneveldt

Board member IJI

Partner Mazars and professor of notarial law Leiden University

Frans Sonneveldt is a partner-shareholder at Mazars Private Clients in The Hague. He is also a professor of succession law and estate planning at the Leiden University in the department of notarial law and associated with the International Tax Center of that university for the Master of Advanced Studies in International Tax Law. He is also attached to the University of Lausanne for the Master of Advanced Studies in International Taxation (MASIT). He is also a deputy justice at the Court of Appeal in Den Bosch.

What our Clients Say About Us

Lawyer Tim de Greve, partner at Stibbe.

I regularly engage the IJI in cases where PIL aspects play a role. The institute has existed for over 100 years and can therefore boast a long history and experience. There are prominent people associated with it. Not least Mr Strikwerda. They support you from the outset, immediately understand the question you are faced with and suggest possible solutions. They have the right connections at home and abroad to answer questions within a reasonable timeframe. Apart from that, it is very pleasant to work with the people of the IJI.

Lawyer Channa Samkalden, Prakken d'Oliveira

We have received advice from the IJI on several cases. One example is a case brought by a number of Nigerian farmers against Shell concerning oil pollution in Nigeria. That case is about the application of Nigerian law by the Dutch court. The IJI looked into the framework of tort law in Nigeria for us. We used that advice in the proceedings and also submitted it to the court and it showed, for instance, that our plaintiffs were also entitled to claim against Shell under Nigerian law. The IJI is extremely useful in all such cases because you receive very sound advice on the basis of which you know whether you should have a number of things investigated further. It’s very useful advice at an early stage of your procedure.

Attorney Ria van Seventer, Meesters aan de Maas Advocaten

Our law firm is based in Rotterdam, a city of more than 170 nationalities, so we regularly have to ask the IJI for advice. For example, I had to deal with the recognition of a child by an Italian man, to which Italian law had to be applied. I don’t speak Italian so I could not do that myself. Nor did I have access to the sources which the IJI has.

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