Adjudication under CIPAA is designed to be quick and binding, but it is not beyond challenge. A party that believes a decision was reached unfairly or improperly can apply to set it aside. However, the grounds are deliberately narrow, because the whole point of adjudication is to provide fast, enforceable relief. This guide explains when and how a CIPAA adjudication decision can be set aside in Malaysia.

Why the grounds are limited

It helps to start with the purpose. Adjudication exists to deliver speedy decisions on payment so that cash keeps flowing through the construction industry. If decisions could be reopened easily, that purpose would be defeated and adjudication would become just another slow, contested process.

For this reason, the law allows challenges only on limited, well-defined grounds. A party cannot set aside a decision simply because they disagree with the outcome or believe the adjudicator made an error of judgment on the merits. The focus is on serious problems with the integrity or fairness of the process, not ordinary disagreements about the result.

The recognised grounds

CIPAA sets out specific grounds on which a decision may be set aside. These centre on situations where the process has gone fundamentally wrong, including where the decision was improperly procured through fraud or bribery, where there has been a denial of natural justice, where the adjudicator has not acted independently or impartially, or where the adjudicator has acted in excess of their jurisdiction.

Each of these is a serious matter. They reflect the principle that while adjudication is fast and the merits are largely left alone, the process must still be honest, fair, and within the adjudicator’s proper authority.

Denial of natural justice

One of the most commonly raised grounds is a denial of natural justice. In broad terms, this means that a party was not given a fair opportunity to present its case, or that the adjudicator decided the dispute on a basis the parties were never given the chance to address.

Natural justice is a cornerstone of fair decision-making. If an adjudicator ignores a party’s submissions entirely, or bases the decision on something neither side argued, the resulting decision may be vulnerable. Establishing this, however, requires more than dissatisfaction, it requires showing a genuine and material unfairness in the process.

Excess of jurisdiction

Another important ground is that the adjudicator exceeded their jurisdiction. An adjudicator’s authority is defined by the dispute referred to them and by the framework of the Act. If the adjudicator decides matters that were not properly referred, or steps outside the scope of their powers, the decision may be challengeable.

This ground reinforces that adjudication operates within boundaries. The adjudicator must stay within the dispute as framed and within the powers the Act confers.

How a challenge works

A party seeking to set aside a decision generally applies to the High Court. The court examines whether one of the recognised grounds is made out, focusing on the integrity and fairness of the process rather than re-trying the underlying dispute.

It is important to act promptly and to frame the challenge carefully around the recognised grounds. A poorly conceived challenge that simply attacks the merits is unlikely to succeed and may waste time and cost. Meanwhile, the successful party may still be able to enforce the decision while the challenge is considered.

Take advice before challenging or defending

Because the grounds are narrow and the stakes are high, both challenging a decision and defending one call for careful legal analysis. Whether you are unhappy with a decision against you or seeking to protect a decision in your favour, early advice helps you understand your prospects and act effectively.