Zondervan RON

Klaas Zondervan is a probate genealogist and NOVEX-certified liquidator. He serves as inheritance law expert on the Dutch TV-series ‘De Erfgenaam’ [‘The Heir’], which is broadcasted on RTL4. Apart from that he is a former member of the Board of the Dutch Association of Legal Advisors (NVRA), columnist with 'De Notarisklerk' ['The Notary's Clerk'] and a sworn translator English.
Conducts genealogical research worldwide and tracks down heirs in all countries imaginable. ☏ +31 (0)85 060 42 43 (select 0 in the menu for English) or ✉️ genealogy@tracersinternational.com | www.tracersinternational.com | www.erfgenamenonderzoek.nl | Alphen aan den Rijn, Netherlands | linkedin.com/in/erfgenamenonderzoek

Work Experience


Aug 2013 - Current
Probate Researcher, Genealogist

A specialist in conducting (genealogical) research in countries such as Indonesia, Tunisia, Japan & China, TracersInternational.com participates in an intercontinental network of probate genealogists, private investigators and heir hunters, making synergetic results achievable.

We have been successfully providing our services to barristers, solicitors and fellow researchers from many different countries around the world, focusing primarily on determining the heirs in accordance with a last will or the (foreign) laws of intestacy. Once determined, the current whereabouts of the beneficiaries are established. You can also contact us to obtain certificates, prenuptial agreements and last wills from abroad.

TracersInternational.com operates in accordance with the General Data Protection Regulation (GDPR) and was issued a license to conduct private investigations by the Dutch Ministry of Security and Justice (POB 1403). More information at www.tracersinternational.com. As of August 2021 the sole proprietorship TracersInternational.com has been replaced by Erfgenamenonderzoek B.V. trading under the name of TracersInternational.com.


May 2020 - Current
Registered Open Source Intelligence (OSINT) Analyst®


Mar 2019 - Current
Sworn Translator English

Specialist in the translation of legal documents from and into the English language.

Missing Money B.V.

Aug 2021 - Current
Asset Recovery Specialist

Mediates in the distribution of funds between the holder of the funds and the entitled party. Participates as Managing Partner in Unclaimed Assets International LLP.

L'Chaim Holding B.V.

Aug 2021 - Current
Managing Director

L'Chaim Holding B.V. supplies management consulting services to operating companies Erfgenamenonderzoek B.V. trading under the name of Erfgenamenonderzoek.nl, Luminis Executele & Vereffening B.V. and Missing Money B.V.

Asset Researcher in estate matters

We carry out asset research both within the Netherlands and abroad at the request of notaries and laywers among others. We also conduct research at the request of and provide aid to creditors [of an estate or an heir] by identifying assets belonging to the estate which may be sold in order to settle the claim. Asset research is essential, not least because it determines the tax base for inheritance tax. Executors or administrators and court-appointed liquidators are jointly and severally liable for the payment of inheritance tax.

Funerary Custodian

The Grafrust Netherlands Foundation preserves the burial rights of ('eternal') (family) graves and in doing so helps prevent these rights from expiring. By transferring your burial rights to the Foundation you are securing them for generation to come. Apart from this, it is possible to 'buy' a(n) ('eternal') grave through the Foundation and entrust the management thereof to the Foundation. For more information please contact us.


May 2020 - Current
Probate Lawyer

With DutchProbate.com we offer services to (descendants of) emigrants and expats of Dutch descent who (may) have a claim against (part of) a Dutch estate.

There is often a situation in which the client cannot properly oversee what his rights are and what rules of play apply to executors and/or other heirs. Not infrequently, there is also a tense relationship between the client and his overseas family members.

We provide our clients with substantive legal advice, assist them throughout the entire process and act as their proxy, whether or not in proceedings before the cantonal court. More information can be read at www.dutchprobate.com.

Member of the Executive Committee

As the industry is unregulated, the IAPPR feels that probate researchers, genealogists and heir hunters need to have the experience and legal knowledge to complete their work properly and to preserve the reputation for quality nurtured over many years by IAPPR members.


Jan 2020 - Current
Managing Partner

MeesterExecuteurs is a nationally operating company driven by associates Paul van der Luit LL.M. and Klaas Zondervan. MeesterExecuteurs provides services in the field of executorship & estate liquidation. For more information, visit www.meesterexecuteurs.nl or call +31 85 060 4243.

Endemol Shine Group

Sep 2018 - Current
'De Erfgenaam' [The Heir] (Expert of the Program) RTL4

Since September 2018 I have been involved in the production of the TV-program 'De Erfgenaam' [The Heir], which will be broadcasted on RTL4 from September 2020 onward. In this program we locate beneficiaries to unclaimed estates both within the Netherlands and abroad. In doing so, we often uncover extraordinary family histories. erfgenaam.erfgenamenonderzoek.nl.


Professional magazine of the union for its members, which I am allowed to write a column in about probate research. The bimonthly appearing journal is in full colour and contains skillfully written articles. To keep and put away for future reference. Topical, competent and crystal-clear. More information can be found at www.bmnvakbond.nl/actueel/magazine.

NOVEX-certified Executor and Liquidator & Qualified Mediator

Luminis Executorship & Liquidations and Luminis Executors are trading names of Luminis Executele & Vereffening B.V.

You can contact us:

  • To appoint us as the executor of your last will or trustee of your assets;
  • for the settlement of an estate as a replacement or additional executor or proxy;
  • for completing the 'legal liquidation' as is required after having accepted an inheritance beneficially;
  • to do the same after having been appointed as liquidator by the court;
  • mediation between heirs and creditors of the estate or between heirs.

We are regularly appointed as liquidator by the courts Noord-Holland and The Hague. More information can be found at www.luminisexecuteurs.nl. For a complete overview of estates we have settled as well as our appointments as liquidator, please visit trackrecord.luminisexecuteurs.nl. As of August 2021 the activities of Stichting Luminis Nalatenschapsafwikkeling trading under the name of Luminis Executorship & Liquidations have been transferred to Luminis Executele en Vereffening B.V. trading under the name of Luminis Executorship & Liquidations.

NB On June 6th 2019 Klaas Zondervan was certified by NOVEX as both executor and liquidator

Former General Member of the Board

The Dutch Association of Legal Advisors (NVRA) is one of the oldest legal professional associations of the Netherlands. Founded in 1928, its members are active in various fields of law. What's more, legal advisors are specialists in litigation before the cantonal court.

The NVRA is thé legal counterpart of The Netherlands Bar (NOvA). Many people do not realize that it is not always necessary to hire an attorney in case of a legal dispute or when initiating legal proceedings before the cantonal court. More information can be found at www.nvra.nl.

Managing Partner

Unclaimed Assets International LLP engages in mediation between the holders of unclaimed funds and the claimants of those funds. We do this worldwide. This mediation concerns the money transaction that takes place as part of the claim. Said process may for instance relate to unclaimed inheritances, funds deriving from buyout procedures of minority stock or bankruptcy funds. More information can be found at www.assetsunclaimed.com.

Forensic expert

Since 2017 I am regularly called upon by the Surrogate's Court in New York to give testimony under oath during hearings in my capacity of forensic expert in the field of (European) probate genealogy (live via Skype or video conferencing).

Zondervan Probate Lawyers

Jan 2015 - Current
Legal Advisor and Qualified mediator

Specialized in the Dutch inheritance law, we have a general law practice based in Alphen aan den Rijn, the Netherlands. We regularly offer expert legal advice to legatees and other creditors of the estate as well as heirs, executors and liquidators.

Worth mentioning in particular is the large number of our clients that is domiciled abroad. Bearing this in mind, it comes as no surprise that our services fit seamlessly with the services offered by DutchProbate.com (see above).

Among the wide range of our services are:

  • Representation in legal proceedings before the cantonal court, such as:
  • submitting a petition to have the executor relieved of his duties or
  • establishing the monetary claim against the estate as a result of the death of the first parent;
  • calculating the forced share and claiming it on behalf of the disowned child;
  • settling the debts of the estate:
  • in this context, we are often appointed liquidator by the courts Noord-Holland and The Hague.
  • settlings estates according to Dutch and foreign law;
  • providing a legal opinion pertaining to the Dutch inheritance law.

For a complete overview of our services, please visit www.zondervanlegal.nl.

Financial and Legal Advisor

Stichting Welzijnszorg Van Maren Fonds (roughly translated: Van Maren Foundation for Welfare (VMF)) focuses on providing material and immaterial support to Freemasons, their partners and their survivors in the first degree. The Van Maren Foundation is employable for Freemasons and their direct family only.

Applications for assistance are considered only when they are submitted via the respective Lodge Correspondents.

Klaas Zondervan is a Master Mason and was initiated in 2007.


Brother Treasurer & Brother Almoner

Freemasonry or Masonry refers to fraternal organisations that trace their origins to the local guilds of stonemasons that, from the end of the 13th century, regulated the qualifications of stonemasons and their interaction with authorities and clients.


Secretary of the Community Service Foundation


Dutch Laws, Civil Law

Activities and Societies: The Dutch United Nations Student Association (DUNSA)

𝑺𝒑𝒆𝒄𝒊𝒂𝒍𝒊𝒔𝒕 𝒄𝒐𝒖𝒓𝒔𝒆 𝒊𝒏 𝑬𝒔𝒕𝒂𝒕𝒆 𝑳𝒊𝒒𝒖𝒊𝒅𝒂𝒕𝒊𝒐𝒏
  • Introduction to liquidations, the appointment and legal position of a liquidator, liquidation as a result of acceptance under the benefit of inventory versus appointment by the court and Guidelines for the Liquidation of Inheritances;
  • in-depth court appointed liquidation - capita selecta, including: the handling of claims and debts of the estate within the process of liquidation, inheritance tax and other tax declarations;
  • liquidation and legal proceedings such as settlement and accountability of the liquidator, liquidation costs, (opposition to) the distribution list, liquidation and distribution, cancellation of the liquidation and free of charge liquidation. The judge and the liquidation - tasks and instructions;
  • liquidation and bankruptcy - similarities as well as differences. Discussion of cases prepared by each participant at the end of the course.

Teachers: professors B.M.E.M. Schols, F.W.J.M. Schols and J.W.A. Biemans, cantonal judge T. Bennebroek et al.

𝑺𝒑𝒆𝒄𝒊𝒂𝒍𝒊𝒔𝒕 𝒄𝒐𝒖𝒓𝒔𝒆 𝒊𝒏 𝑬𝒔𝒕𝒂𝒕𝒆 𝑷𝒍𝒂𝒏𝒏𝒊𝒏𝒈

• Inheritance law, grants;

• matrimonial property law;

• business succession;

• international estate planning;

• asset protection;

• estate planning and income tax;

• estate planning and retirement provision;

• settlement of estates.

Teachers: professors B.M.E.M. Schols, F.W.J.M. Schols, W. Burgerhart, F. Sonneveldt and E.J.W. Heithuis, tax lawyers J. Vrusch LL.M. and A. Verduijn LL.M. RB and tax advisor R. Hoppenreijs M.Sc.

How to get disappeared funds back into the estate?

The webinar provided tools on how to fill the estate with disappeared funds after a death. There was extensive coverage of the obligation to account for what happened during the testator's lifetime, the possibility of nullifying gifts and how general doctrines such as tort, unjust enrichment and undue payment can be deployed in inheritance law.

Teacher: lawyer E.C.E. Schnackers LL.M.

Practical Settlement of Estates

Teachers: lawyer P.G. Knoppers LL.M. and professor A.H.N. Stollenwerck

Litigation in Matters of Succession

Teachers: lawyers M.J.P. Schipper LL.M. and J.Th.M. Diks LL.M.

Insolvent Estates

Teacher: professor J.W.A. Biemans

Liquidation of Estates

Teachers: professor A.H.N. Stollenwerck and dr. W.J.J.G. Speetjens LL.M.

Course in Executorship

Teachers: professors B.M.E.M. Schols and T.J. Mellema-Kranenburg, lawyer P.G. Knoppers LL.M., estate planner J.D.H. van Ewijk LL.M., notarial lawyer J. Nijenhuis-Wildervanck LL.M. and estate manager O.A. Balkenende

Basic course in the Inheritance Law

Teachers: professors B.M.E.M. Schols and F.W.J.M. Schols

Competency certificate Sworn Translator Dutch-English

Passed the translation test in the direction of Dutch > English, taken within the framework for interpretation and translation tests of the Bureau Wbtv

In conjunction with the certificate of competence English > Dutch this is equivalent to a Bachelor of Arts degree in Translation


2020 - 2020
Registered Open Source Intelligence Analyst (module 2)

An OSINT Analyst integrates intelligence data, analyzes, and produces open-source intelligence in response to priority intelligence requirements on political, military, economic, social, criminal, or counterterrorism issues


2020 - 2020
Registered Open Source Intelligence Analyst (module 1)

An OSINT Analyst integrates intelligence data, analyzes, and produces open-source intelligence in response to priority intelligence requirements on political, military, economic, social, criminal, or counterterrorism issues


2019 - 2019
MfN-accredited Basic Training course in Mediation

6-day accelerated Basic Training course in Mediation

"In one week you will be ready for the exam, after which you can start your own practice or apply your skills to your daily activities. We provide an intense training meeting all of the requirements. You can become a mediator in 6 days. After completing the training you can be accredited as a mediator in order to be able to work as a Court Mediator and provide subsidized legal aid."

Teachers: P.J. Tijssen LL.M., lawyer J.C.G.J. van der Linden LL.M., psychologist and MfN-registered family mediator M. Hol M.A. and MfN-registered mediator J.B. Bosman

Competency certificate Sworn translator English-Dutch

Passed the translation test in the direction of English > Dutch, taken within the framework for interpretation and translation tests of the Bureau Wbtv

In conjunction with the certificate of competence Dutch > English this is equivalent to a Bachelor of Arts degree in Translation


2018 - 2018
Provision of data from the Key Register of Persons (BRP)
Course in Authentic Speaking

SVPB, Houten

2013 - 2013
Qualified Private Investigator

Passed three exams with a GPA of 3.33

Percentile 98,8 or 134 IQ

Course in Organizational Psychology
General Banking Course

Widely considered one of the most difficult exams in banking

Diploma obtained in 2003 (first attempt).

Financial Services Management (2nd year Management, Economics and Law)

GPA 3.57

Organization and management, corporate law, marketing of services, e-marketing, financial management, consumer insurance, general course in banking, commercial skills and business plan

First year certificate Management, Economics and Law

Activities and societies: Secretary of the Education Committee

General economics, business economics, research and statistics, sociology / psychology, information management, law, linguistic competence, marketing and English

Professional Memberships / Licenses

International Bar Association
Full Member of the International Bar Association since 2015 Registration number 1168764
Licensed Private Investigator
License allotted by the Dutch Ministry of Security and Justice in October of 2013 Screened by the Chief of Police of The Hague
Nederlandse Vereniging van Rechtskundige Adviseurs [Dutch Association of Legal Advisors] (1928)
Registered as a Lawyer specializing in probate and inheritance law since 2014
NOVEX-certified Executor and Liquidator
Member since 2013, certified since June of 2019
Register Estate Planner [Register of Estate Planners]
Qualified Estate Planner since 2017 Member from March of 2019 up to and including March of 2021
Lloyd's Register
Listed in the Register of Researchers (RON) since March of 2019 Registration number RON-019
NMv - Nederlandse Mediatorsvereniging [Dutch Mediators Association]
Member from August of 2019 up to and including August of 2021 Registration number 30000103
Gids Rechterlijke Macht [Dutch Guide to the Judiciary]
Mentioned as both a Lawyer (since 2015) and a Sworn Translator (since September 8th 2020) Reference number 57090
Nederlandse Genealogische Vereniging [Dutch Genealogical Association]
Member since 2014
Association of Professional Genealogists (APG)
Member since 2013 "The Association of Professional Genealogists (APG) is an international organization dedicated to supporting those engaged in the business of genealogy through advocacy, collaboration, education, and the promotion of high ethical standards."
Indische Genealogische Vereniging [Indian Genealogical Society]
Member since 2014


Professional and Business Liability Insurance (BAV/BVA) (since March of 2014)
Chubb Pro (NVRA collective insurance) (€ 1 million / € 1,25 million) Policy number NVRA 100513
Director's Liability Insurance (since July of 2014)
Markel (€ 500 thousand) Policy number 157010 ONLINE ABT MINT 2013


Native tongue
Cambridge level C2 - proficiency
Professional level


Mr. J. Wolterink, LL.M. [Civil-Law Notary]
Limes Netwerk Notarissen Raadhuisstraat 64 2406 AG Alphen aan den Rijn Netherlands +31(0)172-492447
Mr. J. Kroes, LL.M. [Civil-Law Notary]
Kroes & Partners Notarissen en Adviseurs Aardamseweg 73 A 2461 CB Ter Aar Netherlands +31(0)172-521921
Mr. A.C. de Bakker, LL.M. [Probate Lawyer]
Kerkstraat 36 3341 LE Hendrik-Ido-Ambacht Netherlands +31(0)78-2000373