Observe · Regulate · Protect — since 2007. 19th OIMAP General Assembly: Singapore, 10–12 June 2026. Programme
Arbitration

TAO mediators

36 mediators of 22 nationalities: training, ethics, selection criteria and fields of competence.

Updated : October 28, 2026· 3 min read

Conciliation professionals

Portraits of the Qianlong Emperor and His Twelve Consorts, Giuseppe Castiglione (1736–70s)
Portraits of the Qianlong Emperor and His Twelve Consorts, Giuseppe Castiglione (1736–70s)

The success of a mediation depends largely on the personality of the mediator. The TAO keeps a list of 36 mediators of 22 nationalities, chosen for their training, their experience of conflict and their knowledge of the art world.

The mediators are former judges, lawyers, curators, market experts or occupational psychologists. All have undergone specific training and signed the tribunal's code of ethics.

This page presents their profile, the selection procedure and their obligations.

  • Mediators
  • Training
  • Ethics

TAO mediators in figures

36Mediators
22Nationalities
8Languages spoken
45%Share of women

Source: Registry of the OIMAP Arbitral Tribunal.

Breakdown

Law and judiciary34%
Art market28%
Museums and heritage22%
Psychology and conciliation16%

Careers of the mediators.

Training and ethics

Each mediator shows a certified training in mediation (at least forty hours), five years of experience and knowledge of the art market. Each follows one day of continuing training per year and takes part in practice-analysis groups.

The code of ethics requires impartiality, confidentiality, competence and loyalty. The mediator declares any link with the parties or their counsel before accepting the assignment, and withdraws in the event of a conflict of interest.

The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)
The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)
Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)
Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)
Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439)
Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439)

Choosing a mediator

The parties may agree together on the name of a mediator. Failing that, the Registry proposes a list of three names matching the language, type of dispute and availability required, among which each party ranks its preferences. The Registry then appoints the mediator with the best joint ranking.

A mediator outside the list may be appointed with the Registry's agreement, provided that the mediator complies with the code of ethics. A pair of two mediators may be proposed for complex or multicultural disputes.

Fees and organisation

Fees are set by the tribunal's scale: a basic flat fee for preparation and two sessions, then an hourly rate. They are shared equally between the parties unless otherwise agreed. For a €100,000 dispute, the average cost is €3,200, including administrative costs.

Sessions may be held on the TAO's premises, at one of the parties' premises or remotely. The mediator has a secure space on the Desk to exchange documents with the parties.

Becoming a mediator

Candidates must hold a certified training, have at least five years of relevant professional experience and a good command of two languages. The file is examined by a committee that arranges an interview and role-play exercises.

Appointment is valid for three years, renewable after evaluation by the parties and the Registry. A mentoring programme pairs new mediators with experienced colleagues during their first assignments.

Profiles of mediators

Four profiles
ProfileNumberCompetence
Lawyers12Contracts, restitution
Market specialists10Sales, appraisal
Curators8Heritage, provenance
Psychologists6Family conflicts, inheritances

Milestones

  1. First mediators

    Twelve names.

  2. Code of ethics

    Adopted.

  3. Online mediation

    Specific training.

  4. 36 mediators

    Twenty-two nationalities.

Independence

Portrait of a Woman, Gerard ter Borch (c. 1665)
Portrait of a Woman, Gerard ter Borch (c. 1665)
The Victory Banquet: from Battle Scenes of the Quelling of Rebellions in the Western Regions, with Imperial Poems (c. 1765–74; poem dated 1760)
The Victory Banquet: from Battle Scenes of the Quelling of Rebellions in the Western Regions, with Imperial Poems (c. 1765–74; poem dated 1760)
The Calumny of Apelles, Giorgio Ghisi (1560)
The Calumny of Apelles, Giorgio Ghisi (1560)

One mediator or two

Portrait of a Woman, Giovanni Domenico Tiepolo (1762–70)

One mediator

Common case
  • Reduced cost
  • Simple planning
  • Suited to bilateral disputes

Default choice.

Portrait of a Woman, John I Smart (c. 1772)

Two mediators

Pair
  • Different cultures or languages
  • Legal and artistic complementarity
  • Higher cost

For complex disputes.

Appointing a mediator

  1. Agree

    Discuss a common name.

  2. List

    Receive three proposals.

  3. Classify

    State preferences.

  4. Confirm

    Appointment by the Registry.

  5. Declare

    Signature of the declaration.

Selection criteria

One mediator

Portrait of a Woman, Agnolo Bronzino (c. 1550)
« The best compliment I can be paid is when a party says: "I didn't think we would get there". »
Jean-Marc Pellet, mediator, former judge

Vocabulary of mediators

Pair
Team of two mediators.
Ethics
Professional rules.
Flat fee
Fixed basic price.
Impartiality
Absence of bias.

Frequently asked questions

May I choose for myself?

Yes, by mutual agreement.

How much does a mediator cost?

According to the scale, about €3,200 for €100,000.

Can the mediator be an arbitrator afterwards?

No.

Where do I apply?

Useful documents

Contacts

Egypt and Nubia, Volume I: The Great Temple of Aboo-Simble, Nubia, Louis Haghe (1846)
Egypt and Nubia, Volume I: The Great Temple of Aboo-Simble, Nubia, Louis Haghe (1846)
Registry of the Arbitral Tribunal (TAO)Paris — Head Office+33 1 00 00 04 00greffe.tao@oimap.exampleMonday to Friday, 9 a.m. – 5 p.m.

Request mediation

Portrait of a Woman, Anna Claypoole Peale (1820)

Launch the procedure.

Request mediation
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