Arbitrator Resignation Standards in Arbitration

1. Introduction

Arbitrator resignation is the voluntary termination of an arbitrator's mandate before the arbitration has concluded. Although an arbitrator may technically have the ability to withdraw under the applicable arbitration law or institutional rules, resignation is not ordinarily regarded as an unrestricted personal right.

Once an arbitrator accepts an appointment, the arbitrator assumes a public-procedural function involving duties of independence, impartiality, diligence, fairness, confidentiality, and completion of the mandate. Consequently, resignation is generally expected to occur only where there is a sufficiently serious justification.

The central principle can therefore be stated as:

An arbitrator should not resign merely because the proceedings have become difficult, inconvenient, or unfavorable to the arbitrator; resignation should ordinarily be justified by circumstances that make continued service impossible, impracticable, inappropriate, or inconsistent with the arbitrator's duties.

The precise standard depends upon the lex arbitri, institutional rules, arbitration agreement, and applicable ethical standards.

International arbitration practice recognizes a positive duty to complete an accepted mandate and a corresponding duty not to resign without justification.

2. Resignation Distinguished from Removal and Challenge

These concepts should not be confused.

The distinction is particularly important because resignation does not necessarily amount to an admission that the grounds alleged by a challenging party are valid.

3. Statutory Position under Indian Arbitration Law

The principal provisions are Sections 13, 14 and 15 of the Arbitration and Conciliation Act, 1996.

Section 14 — Failure or impossibility to act

Section 14 provides that an arbitrator's mandate terminates where:

1. the arbitrator becomes de jure unable to perform the functions;
2. the arbitrator becomes de facto unable to perform them;
3. the arbitrator otherwise fails to act without undue delay;
4. the arbitrator withdraws from office; or
5. the parties agree to termination.

Thus, Indian law expressly recognizes withdrawal/resignation as a mechanism terminating the mandate.

Importantly, however, resignation does not automatically mean that every alleged ground for resignation is legally established. Section 14(3) specifically prevents withdrawal from being treated as an admission that the relevant ground was valid.

Section 15 — Termination and substitution

After termination, a substitute arbitrator is generally appointed according to the rules applicable to the appointment of the arbitrator being replaced.

Section 15 therefore serves two objectives:

• ending the former arbitrator's mandate; and
• preserving continuity of the arbitration through substitution.

The Delhi High Court has emphasized that termination of the mandate generally concerns the arbitrator's mandate rather than destruction of the arbitration itself, allowing the substitute arbitrator to continue from the appropriate stage.

4. What Is the Proper Standard for Resignation?

There is no universal single test applicable to every arbitration. Nevertheless, several principles emerge.

A. Resignation should ordinarily have a legitimate basis

A resignation is most defensible where continued service is genuinely impossible or inappropriate.

Examples include:

• serious illness or incapacity;
• conflict of interest discovered after appointment;
• circumstances creating objectively reasonable doubts concerning independence;
• serious threat to the arbitrator's personal safety;
• inability to perform the mandate because of extraordinary circumstances;
• ethical incompatibility;
• appointment becoming legally impossible;
• inability to continue because of circumstances outside the arbitrator's reasonable control.

The stronger the justification, the more defensible the resignation.

B. Personal inconvenience is generally insufficient

An arbitrator should ordinarily not resign simply because:

• the proceedings are lengthy;
• the tribunal has to decide difficult questions;
• the parties are hostile;
• the arbitrator disagrees with procedural decisions of co-arbitrators;
• the arbitrator dislikes a party's submissions;
• the arbitrator expects criticism;
• the case has become professionally inconvenient.

The appointment is a professional commitment, and premature withdrawal can prejudice the parties.

C. Resignation cannot ordinarily be used to manipulate tribunal composition

This is especially important in institutional and investment arbitration.

A resignation designed to permit a particular party to obtain a more favorable replacement can undermine:

• tribunal independence;
• equality of treatment;
• procedural efficiency;
• stability of the tribunal;
• the principle of immutability of the tribunal.

This concern is expressly reflected in Article 56(3) of the ICSID Convention, which restricts the ability of the original appointing party to replace an arbitrator who resigns after constitution of the tribunal.

The purpose is to prevent a party from inducing its arbitrator to resign in order to obtain a more favorable replacement or delay proceedings. The importance of this principle was emphasized in the Pey Casado annulment proceedings.

5. Arbitrator's Duty to Complete the Mandate

An important ethical principle is that an arbitrator who accepts an appointment generally assumes a positive duty to complete the assignment.

This is not an absolute duty. Rather:

The arbitrator should continue unless circumstances arise that reasonably justify withdrawal.

This approach balances two competing considerations:

Tribunal continuity

Arbitration depends heavily upon stability of tribunal composition.

Arbitrator integrity

An arbitrator should not continue where doing so would compromise independence, impartiality, competence or the integrity of the proceedings.

Consequently, resignation may actually be the proper course where continued participation would undermine confidence in the arbitration.

6. Case Law

1. K.C. Palanisamy v. Kasturi & Sons Ltd., Madras High Court (2008)

This is an important Indian authority concerning alleged resignation.

The court rejected the proposition that a party could simply declare that its nominated arbitrator had resigned. The tribunal itself had determined that there had been no resignation.

The court emphasized that a litigant cannot unilaterally assume that an arbitrator has resigned merely because the litigant believes that to be the case. It also cautioned against treating imaginary doubts regarding an arbitrator's independence as sufficient.

Principle

Resignation must be established as a genuine termination of the arbitrator's mandate; a party cannot manufacture a resignation merely by assertion.

This is particularly important where one party seeks to trigger the substitution mechanism under Section 15.

2. Progressive Infotech Pvt. Ltd. v. Ircon International Ltd., Delhi High Court (2023)

The Delhi High Court considered the relationship between Sections 14 and 15.

The court recognized that Section 14 expressly contemplates termination where an arbitrator withdraws from office and Section 15 provides for appointment of a substitute arbitrator.

The court also reiterated the principle that a change in tribunal composition does not automatically invalidate proceedings already conducted.

Principle

Resignation terminates the particular arbitrator's mandate; it does not necessarily terminate the arbitration or invalidate previous procedural steps.

This promotes procedural economy.

3. Union of India v. Reliance Industries Ltd.

This Supreme Court authority is relevant to the statutory framework concerning termination of an arbitrator's mandate under Section 14.

Section 14 operates where an arbitrator becomes de jure or de facto unable to perform, or otherwise fails to act without undue delay. Withdrawal from office is separately recognized as a ground for termination.

Principle

The statutory scheme treats termination of the arbitrator's mandate as a distinct procedural event and provides a mechanism for judicial determination where controversy exists.

The case is particularly useful in understanding the difference between:

• inability to act;
• failure to act; and
• voluntary withdrawal.

4. M/s Milkfood Pvt. Ltd. v. M/s GMC Ice Cream (P) Ltd., Supreme Court (2011)

Although the case primarily concerned the jurisdictional consequences of proceedings concerning termination of an arbitrator's mandate, it illustrates the importance of the statutory framework surrounding termination.

The Supreme Court emphasized the jurisdictional structure applicable to applications concerning an arbitrator's mandate.

Principle

Termination of an arbitrator's mandate is not merely an informal procedural matter; where statutory intervention is required, the application must be made before the court having jurisdiction under the applicable arbitration legislation.

5. Victor Pey Casado and President Allende Foundation v. Republic of Chile, ICSID Case No. ARB/98/2

This is one of the most significant international examples concerning resignation.

An arbitrator resigned during the proceedings, resulting in a vacancy and reconstitution of the tribunal. Subsequent proceedings examined the consequences of that resignation.

The case illustrates that resignation may have substantial procedural consequences, particularly where tribunal composition is governed by the ICSID Convention.

The later annulment proceedings specifically discussed Article 56(3), which is designed to prevent manipulation of tribunal composition following resignation.

Principle

A resignation after constitution of an ICSID tribunal can trigger special replacement mechanisms intended to protect tribunal stability and prevent strategic manipulation.

6. Pey Casado v. Chile — resignation following challenge

The same arbitration provides a particularly useful example of resignation in response to a challenge.

An arbitrator faced a challenge and, despite considering the challenge unfounded, concluded that resignation was appropriate because continuing in the circumstances could distract from the arbitration and damage the proceedings.

The resignation was therefore not necessarily an admission that the challenge was legally justified.

Principle

An arbitrator may resign as a practical means of protecting the arbitration even where the arbitrator does not accept the substantive validity of the challenge.

This is a particularly important distinction between resignation and admission of disqualification.

7. Hrvatska Elektroprivreda d.d. v. Republic of Slovenia, ICSID Case No. ARB/05/24

This ICSID authority is important for the broader principle of immutability of tribunal composition.

The case discussed Article 56 and the concern that a party should not be able to procure resignation of its arbitrator in order to manipulate the subsequent appointment process.

The underlying rationale is that, once properly constituted and proceedings have commenced, the tribunal should remain stable except in circumstances contemplated by the Convention.

Principle

Resignation cannot be viewed solely as an individual arbitrator's private decision because it affects the institutional integrity and composition of the tribunal.

The ICSID framework was specifically designed to reduce the possibility that a party might induce its arbitrator to resign to obtain a more advantageous replacement.

8. Vanessa Ventures Ltd. v. Venezuela, ICSID Case No. ARB/05/24

This arbitration provides another illustration of resignation in circumstances involving concerns regarding the tribunal's continued functioning.

The circumstances were subsequently discussed in the Pey Casado proceedings, including questions concerning the significance of the earlier resignation and the standards governing arbitrator independence and resignation.

Principle

An arbitrator's decision to resign must be assessed in its procedural context and should not automatically be characterized as evidence of partiality or misconduct.

7. Resignation Following an Arbitrator Challenge

One of the most difficult situations occurs when a party challenges an arbitrator.

Suppose Party A alleges that Arbitrator X is biased.

There are three possible outcomes:

Option 1 — Challenge rejected

The arbitrator remains in office.

Option 2 — Challenge upheld

The arbitrator is removed/replaced.

Option 3 — Arbitrator resigns

The arbitrator voluntarily withdraws.

The third situation requires particular care.

Resignation does not necessarily establish that the challenge was meritorious.

An arbitrator may conclude:

"Although I consider the challenge unfounded, the level of hostility has become such that my continued participation may damage the arbitration."

That is essentially what occurred in the Pey Casado example.

8. Resignation Because of Conflict of Interest

Discovery of a previously unknown conflict is one of the strongest grounds for resignation.

For example, an arbitrator may discover that:

• their law firm has recently acted for an affiliate of a party;
• a close professional associate represents a party;
• the arbitrator has a financial interest connected with the dispute;
• a family member has a material connection with the dispute;
• the arbitrator has a relationship that creates objectively reasonable doubts.

In such circumstances, resignation may be preferable to risking:

• challenge proceedings;
• annulment;
• enforcement objections;
• allegations of procedural unfairness;
• reputational damage to the arbitration.

However, resignation should not automatically be used instead of disclosure.

Disclosure should ordinarily come first where appropriate, because the parties and institution may determine whether the circumstance actually creates a disqualifying conflict.

9. Resignation Due to Illness or Incapacity

Physical or mental incapacity may constitute a legitimate basis for resignation where it prevents the arbitrator from performing the mandate.

The relevant consideration is not simply whether the arbitrator has a medical problem but whether the condition makes continued performance of the arbitral functions genuinely impracticable.

This overlaps with the concepts of:

• de jure inability, and
• de facto inability

under Section 14 of the Indian Act.

10. Resignation Because of Excessive Delay

An arbitrator may encounter circumstances in which continuing to serve becomes impossible because of:

• overwhelming professional commitments;
• prolonged proceedings;
• unexpected complexity;
• repeated procedural disputes;
• inability to devote adequate time.

But mere workload is not automatically a sufficient justification.

Once an arbitrator has accepted the mandate, the arbitrator should ordinarily make reasonable efforts to discharge it.

A resignation caused by foreseeable inconvenience is considerably weaker than one caused by an unforeseen circumstance that genuinely makes performance impracticable.

11. Resignation and Tribunal Fees

Resignation may have consequences for remuneration.

Under the English Arbitration Act framework, parties may agree in advance upon the financial consequences of resignation. Where there is no agreement, the court may determine the arbitrator's entitlement to fees and expenses and may order repayment of fees already paid.

This reflects an important policy:

An arbitrator who abandons a mandate without adequate justification should not necessarily expect to retain the entire economic benefit of the appointment.

Conversely, where resignation is reasonable, denying remuneration may be inappropriate.

12. England and Wales — Important Modern Position

Under the Arbitration Act 1996, Section 25 historically dealt with the consequences of resignation, including possible relief from liability.

The Arbitration Act 2025 has changed this framework. The revised legislation focuses Section 25 principally on entitlement to fees and expenses, while Section 29 has been amended concerning arbitrator immunity.

The current statutory approach provides that an arbitrator's resignation does not itself create liability unless the relevant statutory threshold concerning unreasonable resignation is satisfied.

Thus, English law illustrates a broader proposition:

The legal consequences of resignation depend not merely on the fact of resignation but on whether the resignation was justified or unreasonable in the circumstances.

13. Institutional Arbitration

Institutional rules frequently impose additional safeguards.

For example, under the ICC Rules, an arbitrator is replaced following the ICC Court's acceptance of the arbitrator's resignation. The ICC Court may also initiate replacement where an arbitrator is legally or factually prevented from performing the functions or fails to perform them in accordance with the Rules or within prescribed time limits.

Therefore, in institutional arbitration:

Arbitrator → resignation request → institution considers/accepts resignation → vacancy → replacement procedure

The arbitrator cannot necessarily treat resignation as a purely unilateral private act.

14. Consequences of Resignation

Once resignation becomes effective, several consequences may follow.

1. Termination of mandate

The resigning arbitrator ceases to possess authority to act as a member of the tribunal.

2. Appointment of substitute

The applicable statute, institutional rules or arbitration agreement determines how the replacement is selected.

3. Possible repetition of proceedings

The reconstituted tribunal may need to determine whether previous hearings or procedural steps must be repeated.

4. Financial consequences

Fees and expenses may be adjusted depending upon the circumstances.

5. Possible disclosure issues

Where resignation relates to a conflict, parties may need sufficient information to understand the procedural consequences.

6. Potential delay

Resignation can cause substantial delay, particularly where:

• pleadings are complete;
• hearings have already occurred;
• extensive evidence has been examined;
• expert testimony has been heard;
• the tribunal is close to issuing an award.

15. Can a Party Force an Arbitrator to Resign?

Generally, no.

A party can:

• raise a challenge;
• request disclosure;
• seek removal under applicable law;
• request institutional intervention.

But it cannot simply demand that the arbitrator resign.

Similarly, an arbitrator should not resign merely because a party has made an aggressive or politically motivated demand.

The proper distinction is between:

legitimate challenge → independent decision-making mechanism

and

pressure to resign → potentially abusive interference with tribunal independence.

16. Strategic or Abusive Resignation

A particularly serious problem arises when resignation is strategically engineered.

Examples include:

1. a party privately persuading its appointed arbitrator to resign;
2. resignation immediately before a crucial procedural ruling;
3. resignation designed to obtain a more sympathetic replacement;
4. resignation intended to restart the arbitration;
5. resignation designed to delay the award;
6. resignation after the arbitrator has formed an unfavorable view of the appointing party's case.

Such conduct can undermine the integrity of arbitration.

The ICSID Convention's Article 56 mechanism is particularly significant because it addresses the danger that a party could induce its arbitrator to resign and thereby manipulate the replacement process. Pey Casado expressly recognized this concern.

17. Effect on Earlier Proceedings

A resignation does not automatically invalidate everything that happened before resignation.

This is an important practical principle.

Suppose:

• Arbitrator A resigns after a two-year arbitration;
• 3,000 documents have been admitted;
• witness statements have been exchanged;
• the evidentiary hearing has concluded.

It would be highly inefficient to automatically restart the entire arbitration.

The replacement tribunal therefore normally considers:

• what proceedings have already occurred;
• whether the replacement arbitrator has reviewed the record;
• whether any witness must be recalled;
• whether procedural fairness requires repetition;
• the applicable institutional rules.

The Indian courts' treatment of substitution similarly emphasizes that the arbitration does not necessarily start afresh merely because an arbitrator's mandate has ended.

18. Resignation After the Hearing

Resignation after the close of hearings raises particularly serious concerns.

At that stage:

• the tribunal may have already deliberated;
• the evidentiary record is complete;
• the award may be close to completion.

A late resignation can therefore cause disproportionate prejudice.

Institutional rules may give the administering institution special powers in such circumstances. The ICC, for example, has mechanisms concerning replacement and may consider whether proceedings should be repeated following reconstitution.

The closer the arbitration is to an award, the stronger the justification generally required for resignation.

19. Standard for Evaluating Whether Resignation Was Justified

A useful analytical test is:

Question 1 — Was there an objective impediment?

Was there something more than subjective inconvenience?

Question 2 — Was the impediment serious?

Did it materially affect the arbitrator's ability to perform?

Question 3 — Was resignation necessary?

Could disclosure, recusal from a particular issue, procedural adjustment or another less disruptive measure have solved the problem?

Question 4 — Was the circumstance foreseeable?

An unexpected event provides a stronger justification than a foreseeable inconvenience.

Question 5 — Was the resignation timely?

An arbitrator should normally act promptly once a serious impediment becomes apparent.

Question 6 — Was the resignation potentially strategic?

If the resignation benefits one party by enabling manipulation of the appointment mechanism, scrutiny should be heightened.

Question 7 — What prejudice will result?

The court or institution may consider the stage of arbitration and consequences for the parties.

20. Resignation and Independence/Impartiality

Resignation can sometimes protect, rather than undermine, arbitral legitimacy.

If an arbitrator develops a conflict that cannot reasonably be cured by disclosure, resignation may be the most responsible solution.

Thus:

Continued participation despite serious conflict → risk to award

whereas

properly justified resignation → protection of procedural legitimacy.

This explains why resignation should not automatically be treated as misconduct.

21. Key Principles Emerging from the Case Law

The authorities collectively support the following propositions:

1. An accepted appointment carries a duty to perform the mandate.
2. Resignation should ordinarily have a genuine and defensible justification.
3. A party cannot simply declare that an arbitrator has resigned.
   K.C. Palanisamy v. Kasturi & Sons Ltd.
4. Resignation terminates the particular arbitrator's mandate but does not ordinarily destroy the arbitration.
   Progressive Infotech v. Ircon International.
5. A substitute arbitrator can generally continue the proceedings rather than automatically restarting them.
6. Resignation does not necessarily constitute an admission that a challenge is valid.
   Pey Casado v. Chile.
7. Tribunal composition enjoys significant protection against manipulation.
   Hrvatska Elektroprivreda and Pey Casado.
8. Strategic resignation designed to manipulate replacement can undermine arbitration.
9. Conflict of interest, genuine incapacity and serious ethical concerns are substantially stronger grounds for resignation than mere inconvenience.
10. The financial consequences of resignation may depend upon whether the resignation was reasonable.

22. Practical Standard for Arbitrators

An arbitrator considering resignation should ideally proceed in the following manner:

Step 1 — Identify the reason for resignation.

Determine whether it is a genuine inability, conflict, ethical problem or merely inconvenience.

Step 2 — Examine the applicable law and institutional rules.

The consequences differ considerably between:

• Indian arbitration;
• English arbitration;
• ICC arbitration;
• ICSID arbitration;
• UNCITRAL arbitration.

Step 3 — Consider disclosure.

Where the issue concerns independence or impartiality, disclosure may sometimes be preferable to immediate resignation.

Step 4 — Notify the institution/appointing authority.

In institutional arbitration, resignation may require institutional acceptance.

Step 5 — Consider procedural prejudice.

Particularly where the arbitration is near completion.

Step 6 — Explain the resignation appropriately.

The arbitrator should avoid unnecessarily revealing deliberative matters or confidential information.

Step 7 — Preserve the record.

All documents and information must remain subject to continuing confidentiality obligations.

Step 8 — Cooperate with replacement.

The resigning arbitrator should facilitate an orderly transition without attempting to influence the identity of the successor.

23. Conclusion

The modern law of arbitrator resignation rests upon a balance between tribunal stability and arbitrator integrity.

An arbitrator who accepts an appointment undertakes to perform a serious adjudicative function and should ordinarily complete the mandate. Resignation should therefore not be treated as a convenient escape from an inconvenient arbitration.

At the same time, the duty to continue is not absolute. Where an arbitrator becomes legally or factually incapable of acting, develops a serious conflict, faces circumstances that objectively compromise the integrity of the proceedings, or encounters another substantial impediment, resignation may be both permissible and desirable.

The most important distinction is therefore:

Resignation is legitimate when it protects the integrity of the arbitral process; it becomes problematic when it is used to evade the mandate, manipulate tribunal composition, obtain strategic advantage, or unnecessarily disrupt the proceedings.