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

Request mediation

How to start a mediation before the TAO: form, inviting the other party, time limits and first steps.

Updated : October 28, 2026· 3 min read

A simple first step

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

Requesting mediation requires neither a trial nor a prior clause. One party may invite the other to use it, through a simple form, and the Registry takes care of proposing it. If the other party accepts, the process starts within fifteen days.

The request is free of charge: only the mediator's fees and reduced administrative costs are payable once mediation has been accepted.

This page describes the stages, the mediation agreement and the precautions to take.

  • Request
  • Agreement
  • Mediation

Requesting mediation in figures

15 dAverage time before the first session
€0Cost of the request
70%Invitations accepted
7 wksAverage duration thereafter

Source: Registry of the OIMAP Arbitral Tribunal.

Breakdown

Accepted70%
Declined20%
No answer10%

Outcome of invitations in 2024.

Filling in the request

The online form asks for the identity of the parties, a summary of the dispute in a few lines, the amount in issue if any, the language wanted and, where relevant, the name of the preferred mediator. No document is required at this stage.

The Registry forwards the invitation to the other party within two days and allows ten days to reply. It can arrange a telephone interview to explain mediation to a hesitant party.

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)
The Calumny of Apelles, Giorgio Ghisi (1560)
The Calumny of Apelles, Giorgio Ghisi (1560)
The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)
The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)

The mediation agreement

If the parties accept, they sign an agreement setting the mediator, the timetable, confidentiality, the sharing of costs and the suspension of limitation and procedural time limits. It is signed online.

The agreement also specifies that the mediator cannot be called as a witness and that mediation exchanges will not be produced before the tribunal or a judge. The parties undertake to take part in good faith.

Preparing for the first session

Each party writes a one-page position note, which remains confidential. It gathers the key documents, checks who will have decision-making authority and sets a range of acceptable solutions. It is also useful to think about the best and worst alternatives in the event of failure.

The mediator contacts the parties individually before the first session to prepare the ground and answer their questions. This preliminary exchange markedly improves the chances of success.

And if the other party refuses

Refusal closes no door: arbitration remains possible if the agreement provides for it, and mediation may be proposed again during the proceedings. In some mediation-arbitration clauses, an unjustified refusal may be taken into account in the allocation of costs.

The Registry may offer a separate information interview to allay the concerns of the reluctant party: cost, confidentiality, absence of commitment.

From the request to the first session

Five stages
StageTime limitResponsible party
RequestDay 0Applicant
InvitationWithin 2 daysRegistry
Answer10 daysOther party
AgreementWithin 5 daysParties and Registry
First sessionAbout 15 daysMediator

Milestones

  1. Request

    Form.

  2. Invitation

    Sent.

  3. Answer

    Acceptance.

  4. Agreement

    Signature.

  5. First session

    Opening.

Reinforced confidentiality

Portrait of a Woman, John I Smart (c. 1772)
Portrait of a Woman, John I Smart (c. 1772)
Coronation of the Virgin, Christoffel Jegher (1632–36)
Coronation of the Virgin, Christoffel Jegher (1632–36)
Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)
Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)

Unilateral or joint request

Portrait of a Woman, Agnolo Bronzino (c. 1550)

Unilateral

One party invites
  • Quick to launch
  • Depends on the other's agreement
  • The Registry assists

The most frequent case.

Portrait of a Man, Possibly Sir Soulden Lawrence, John I Smart (1770)

Joint

Both parties request
  • Agreement already reached
  • Immediate start
  • Constructive atmosphere

Ideal.

Launching a mediation

  1. Fill in

    Online form.

  2. Invite

    The Registry contacts the other party.

  3. Sign

    Mediation agreement.

  4. Prepare

    Position note.

  5. Take part

    Opening session.

To plan for

A collector

Portrait of a Woman, Anna Claypoole Peale (1820)
« I wrote to the Registry on a Thursday; the following Tuesday, my opponent had been contacted. We settled the matter in six weeks. »
Étienne Vallon, collector

Vocabulary of the request

Invitation
Proposal of mediation sent to the other party.
Mediation agreement
Agreement organising the mediation.
Position note
Confidential presentation of one's interests.
Suspension
Temporary halt of a time limit.

Frequently asked questions

Can the other party refuse?

Yes, mediation is voluntary.

Who pays?

The parties equally.

How long to reply?

Ten days.

Where can I see the mediators?

Useful documents

Contacts

Small Mosque in the Kaiserbagh, Felice A. Beato (1858)
Small Mosque in the Kaiserbagh, Felice A. Beato (1858)
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

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

Fill in the form.

Request mediation
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