Knowledge Is Not Notice: When Does the Clock Really Start on Challenging an Arbitral Award in the UAE?

Dubai Court of Cassation, Appeal No. 24 of 2025, judgment dated 29 June 2026

A party loses an arbitration. It sees the award. It is even handed a copy. Months go by and it says nothing. Has the thirty day window to challenge that award quietly closed? The Dubai Court of Cassation was recently asked exactly this question, and its answer will matter to anyone who runs or advises on UAE seated arbitrations.

The Court said no. And it did not stop there. In the same judgment, it went further and held that a failure to notify a party of the arbitration proceedings themselves, not just the award, can bring the entire award down.

Does simply knowing about the award start the clock?

No, and the Court was firm about it. The thirty day time limit for a nullification action only begins once the award has been properly notified to the party seeking to challenge it, or a copy has been delivered in the manner required by Article 54(2) of Federal Law No. 6 of 2018 on Arbitration.

This is not a box ticking exercise. It is a deliberate safeguard, built in so that the starting point of the clock can be fixed with certainty. Because of that, nothing else can stand in for it, not even conduct that makes plain the losing party already knew what the award said.

Three findings from the judgment stand out in particular:

• Actual, even certain, knowledge of an award does not remove the need for formal legal notifications
• Responding to a ratification request, or producing a copy of the award in an unrelated dispute, does not set the thirty day period running.
• The clock is tied exclusively to proper notification or delivery of the award, never to knowledge acquired by other means.

What was actually being argued?

The appellant's case was straightforward on its face. The company against which the award had been made, it argued, already knew about it. That company had seen the award during a separate application and had been given a copy of it. On that basis, the nullification action had been brought out of time and should never have been heard at all.

The Court of Cassation was not persuaded. Knowledge of an award, however certain, does not start the clock unless the award was properly notified, or a copy delivered, in accordance with the law. Seeing a document is not the same as being served with it.

Does the same logic apply earlier, to notice of the proceedings themselves?

It does, and here the ruling has sharper teeth. The Court did not confine itself to how the award is notified. It also underlined, with some force, the need for proper notification of the arbitration proceedings from the outset.

In this case, the technical expert's report established that the losing party had never been properly notified that the arbitration was happening at all. The consequence was that it lost the chance to put forward its defence, which is one of the grounds for nullification set out in Article 53 of the Arbitration Law. On that basis, the Court of Cassation upheld the decision nullifying the award.

So what actually counts as proper notification?

The Court was clear that this comes down to proven receipt, not proof of dispatch. Sending a notice by email or courier is not, by itself, enough. Receipt has to be established in line with the applicable procedures and rules.

Where a chosen method of notification turns out not to work, or where something suggests a notice never actually arrived, the tribunal cannot simply move on. It must take real care to check whether the method used was valid, and look for other ways to make sure the notice reaches the party concerned. The point of all this is to protect the right to be heard and to let each side properly defend itself.

Get this wrong, and a party can lose its award even where the tribunal handled the substance of the dispute impeccably and completed every other procedural step correctly.

Two stages, two very different consequences

The judgment draws a clean line between two distinct stages of the arbitral process, each carrying its own safeguards and its own consequences.

Notification of the arbitration proceedings to the opposing party is a fundamental safeguard that allows that party to defend itself. Any defect or shortfall in it renders the award void, provided it results in that party being deprived of the chance to present its case.

Notification of the award is a different matter entirely. It has no bearing on the validity of the award itself. What it determines is when the thirty day window for a nullification action begins. That window only opens on proper notification or delivery of the award, and certain knowledge acquired by other means cannot open it early.

What this means in practice

For parties and tribunals operating in UAE seated arbitrations, three lessons follow directly from this ruling.

1.    Prove receipt, not dispatch. Keep delivery confirmations, courier receipts and signed acknowledgements. An email sitting in a sent folder proves nothing about whether it was received.

2.    Escalate the moment notice looks like it has failed. If a chosen method does not work, or there is any sign a notice has gone astray, the tribunal must try something else. Doing nothing at that point is itself a route to nullification.

3.    Do not lean on the other side's evident knowledge. If you have won an award, serve it properly. Until that happens, the thirty day window has not opened, and the award remains open to challenge no matter how much time has passed.

Taken as a whole, the decision is a firm reinforcement of the procedural safeguards that sit underneath arbitration in the UAE. Notification is not paperwork to be dealt with and forgotten. It is the mechanism through which the right to be heard is actually protected, and this Court has just confirmed how seriously it intends that mechanism to be taken.