Independence and Impartiality of Arbitrators

August 23, 2025April 11, 2026

Annulment | Motivation Arbitral Award | Impartiality Arbitrators | International Public Policy | Due Process – Case # 139

Annulment | Motivation Arbitral Award | Impartiality Arbitrators | International Public Policy | Due Process

Lisboa Court of Appeal

Case No. 2394/22.8YRLSB-2

Date: 13 February 2025

Link to DGSI website HERE

Keywords: Annulment | Motivation Arbitral Award | Impartiality Arbitrators … Read more

May 30, 2020April 11, 2026

Lisbon Court of Appeal | Independence and Impartiality of the Arbitrators | IBA Guidelines on Conflicts of Interest | Multiple Appointments | Duty to Disclose | Case #108

Lisbon Court of Appeal | Independence and Impartiality of the Arbitrators | IBA Guidelines on Conflicts of Interest | Multiple Appointments | Duty to Disclose | Case #108
Case nr. 1577/18.0YRLSB-1
11-02-2020
LINK DGSI

Summary:

I- Non-compliance or defective fulfilment … Read more

May 28, 2020April 11, 2026

Lisbon Appeal Court | Time Limit to Seek Annulment | Annulment of Arbitral Awards | Vexatious Litigation | Litigate in Bad Faith | Limitation Period | Bad Faith’s Litigation | IBA Guidelines | Independence and Impartiality | Case #107

Lisbon Appeal Court | Time Limit to Seek Annulment | Annulment of Arbitral Awards | Vexatious Litigation | Litigate in Bad Faith | Limitation Period | Bad Faith’s Litigation | IBA Guidelines | Independence and Impartiality | Case #107
Case

August 30, 2018April 11, 2026

Lisbon Court of Appeal | Impartiality and Independence of Arbitrators | Challenge of Arbitrator | 01-02-2018 | Case #023

Lisbon Court of Appeal
Date: 01-02-2018
Case Nr. 1320/17.0YRLSB-8
LINK DGSI

Headline:

The Arbitrator’s prior opinion on a given issue does not in itself imply a lack of independence or impartiality.

Summary:

The fact that the arbitrator has

August 29, 2018April 11, 2026

Lisbon Court of Appeal | Impartiality and Independence of Arbitrators | Challenge of Arbitrator | 03-10-2017 | Case #022

Lisbon Court of Appeal
Date: 03-10-2017
Case Nr. 1177/17.1YRLSB-7
LINK DGSI

Headline:

In cases where omission to disclose is of substance that is fundamental in nature, this in itself would point towards a lack of independence or impartiality. Where

August 26, 2018April 11, 2026

Lisbon Court of Appeal | Impartiality and Independence of Arbitrators | IBA Guidelines | Challenge of Arbitrator | 13-09-2016 | Case #021

Lisbon Court of Appeal
Date: 13-09-2016
Case Nr. 581/16.7YRLSB.-1
LINK DGSI

Headline:

A challenge to an arbitrator’s independence and impartiality is to be determined through an objective criterion, and not through the eyes of either party.

A nomination for

August 16, 2018April 11, 2026

Lisbon Court of Appeal | Impartiality and Independence of Arbitrators | Challenge of Arbitrator | 29-09-2015 | Case #0020

Lisbon Court of Appeal
Date: 29-09-2015
Case Nr. 827/15.9YRLSB-1
LINK DGSI

Headline:

Non-disclosure of relevant circumstances may lead to justifiable doubts against an arbitrators independence and impartiality.

Summary:

The arbitrator did not disclose at the time of

August 15, 2018April 11, 2026

Lisbon Court of Appeal | Impartiality and Independence of Arbitrators | Challenge of Arbitrator | 24-03-2015 | Case #019

Lisbon Court of Appeal
Date: 24-03-2015
Case Nr. 1361/14.0YRLSB.L1-1
LINK DGSI

Headline:

Arbitrator can be disqualified for being repeatedly appointed by same party/law firm if the circumstances in question give rise to justifiable doubts.

Provisions under IBA Guidelines on

Lisbon Court of Appeal | Independence and Impartiality of the Arbitrators | IBA Guidelines on Conflicts of Interest | Multiple Appointments | Duty to Disclose | Case #108Case nr. 1577/18.0YRLSB-111-02-2020LINK DGSI

Summary:

Lisbon Appeal Court | Time Limit to Seek Annulment | Annulment of Arbitral Awards | Vexatious Litigation | Litigate in Bad Faith | Limitation Period | Bad Faith’s Litigation | IBA Guidelines | Independence and Impartiality | Case #107Case

Lisbon Court of Appeal Date: 01-02-2018 Case Nr. 1320/17.0YRLSB-8 LINK DGSI

Headline:

The Arbitrator’s prior opinion on a given issue does not in itself imply a lack of independence or impartiality.

Summary:

Lisbon Court of Appeal Date: 03-10-2017 Case Nr. 1177/17.1YRLSB-7 LINK DGSI

Headline:

In cases where omission to disclose is of substance that is fundamental in nature, this in itself would point towards a lack of independence or impartiality. Where

Lisbon Court of Appeal Date: 13-09-2016 Case Nr. 581/16.7YRLSB.-1 LINK DGSI

Headline:

A challenge to an arbitrator’s independence and impartiality is to be determined through an objective criterion, and not through the eyes of either party.

A nomination for

Lisbon Court of Appeal Date: 29-09-2015 Case Nr. 827/15.9YRLSB-1 LINK DGSI

Headline:

Non-disclosure of relevant circumstances may lead to justifiable doubts against an arbitrators independence and impartiality.

Summary:

Lisbon Court of Appeal Date: 24-03-2015 Case Nr. 1361/14.0YRLSB.L1-1 LINK DGSI

Headline:

Arbitrator can be disqualified for being repeatedly appointed by same party/law firm if the circumstances in question give rise to justifiable doubts.

Provisions under IBA Guidelines on

Lisbon Court of Appeal | Independence and Impartiality of the Arbitrators | IBA Guidelines on Conflicts of Interest | Multiple Appointments | Duty to Disclose | Case #108
Case nr. 1577/18.0YRLSB-1
11-02-2020
LINK DGSI

Lisbon Appeal Court | Time Limit to Seek Annulment | Annulment of Arbitral Awards | Vexatious Litigation | Litigate in Bad Faith | Limitation Period | Bad Faith’s Litigation | IBA Guidelines | Independence and Impartiality | Case #107
Case

Lisbon Court of Appeal
Date: 01-02-2018
Case Nr. 1320/17.0YRLSB-8
LINK DGSI

Lisbon Court of Appeal
Date: 03-10-2017
Case Nr. 1177/17.1YRLSB-7
LINK DGSI

Lisbon Court of Appeal
Date: 13-09-2016
Case Nr. 581/16.7YRLSB.-1
LINK DGSI

Lisbon Court of Appeal
Date: 29-09-2015
Case Nr. 827/15.9YRLSB-1
LINK DGSI

Lisbon Court of Appeal
Date: 24-03-2015
Case Nr. 1361/14.0YRLSB.L1-1
LINK DGSI