ET3 Response Deadline: Why Respondents Should Not Ignore Tribunal Papers

Why the ET3 matters

When an Employment Tribunal claim arrives, the respondent’s first mistake may be to treat it like ordinary correspondence.

It is not.

The ET3 response is the respondent’s procedural gateway into the defended case. It tells the Tribunal whether the claim is resisted, what is admitted, what is disputed, and what factual and legal answer the respondent relies on.

If the ET3 is late, defective, rejected or missing, the respondent may lose ordinary control of the defended case quickly. The Tribunal may move into the no-response rules, decide what can properly be determined on the available material, and restrict the respondent’s participation unless an extension is granted.

That does not mean every late response is fatal. The Tribunal has a discretion to extend time. But the respondent must act quickly, explain the delay, provide a proper draft response where required, and address the practical justice of allowing the case to be defended.

The ET1 sets out the claimant’s case. The ET3 sets out the respondent’s answer. Once both are accepted, the Tribunal can identify the issues, manage the case, consider jurisdictional points, order further information, list hearings and move the dispute towards determination.

A respondent who treats the ET3 as an administrative form risks more than inconvenience. A missing or rejected response may change how the case proceeds. A late response may require a discretionary extension. A defective response may require reconsideration. A respondent who says nothing may find that parts of the claim are determined on the material already available.

The ET3 should therefore be treated as a litigation document. It should not be left to the last internal inbox, the last HR meeting, or the last day before the deadline.

The 28-day deadline

The usual rule is that the Tribunal must receive the response within 28 days of the date on which the Tribunal sent the claim form.

That distinction matters. The deadline should not be treated casually as 28 days from when the respondent finally reads the papers, forwards them internally, locates the HR file, or speaks to a solicitor. The correct date should be checked against the Tribunal correspondence and any directions.

The first practical step is to record the date the Tribunal sent the claim form and calculate the response deadline immediately.

If more time is genuinely needed, the respondent should apply before the deadline if possible. Waiting until after time has expired makes the position more difficult. Once the deadline has passed, the respondent is not simply asking for more time in advance. It is asking the Tribunal to excuse non-compliance and admit a late response.

That can happen, but it is not automatic.

What the response must do

A response must be presented on the proper response form and contain the required minimum information. At a basic level, the Tribunal needs to know who the respondent is, where the respondent can be contacted, and whether the respondent resists all or part of the claim.

That is the minimum gateway. It is not the same as a good defence.

A strong ET3 should identify what is admitted, what is denied, what is not known, what jurisdictional points are taken, what factual account is relied on, and what documents or witnesses are likely to matter.

For example, a respondent may need to address whether the claimant was an employee, worker or self-employed contractor; whether the named respondent is the correct legal entity; whether the claim is in time; whether Acas Early Conciliation appears to have been complied with; whether dismissal, detriment, discrimination, whistleblowing, wages or contract issues are disputed; and whether remedy is contested.

Late, defective and rejected responses are different

Not every ET3 problem is the same.

Those routes can overlap, but they are not identical. A respondent who receives a rejection notice should not assume that sending an informal explanation is enough. The correct procedural route needs to be identified and used promptly.

The practical point is direct: if the ET3 has been rejected or is late, act immediately. Delay after discovering the problem can make an already difficult application worse.

Applying for more time

A respondent who needs more time should ask for it properly.

If the deadline has not yet passed, the respondent should apply as soon as it realises more time is genuinely needed. The application should explain why more time is required, how much more time is sought, what steps have already been taken, and when the response will be ready.

If the deadline has already passed, the position is more serious. The application should usually be accompanied by a draft response. If that is not possible, the respondent should explain why.

The reason is straightforward. The Tribunal is not merely being asked to excuse lateness in the abstract. It is being asked to decide whether the respondent should be allowed into the defended case. The Tribunal will usually need to understand both why the response is late and whether there is a real defence to be considered.

What the Tribunal is likely to consider

The Tribunal has a broad discretion when deciding whether to extend time for a late ET3 response.

That discretion is not mechanical. It is not decided by one factor alone. The Tribunal will usually look at the whole picture.

The explanation for delay is important. A short delay with a clear and documented explanation is different from a long delay with no coherent account. But a poor explanation does not necessarily end the analysis. The Tribunal may still consider the merits of the proposed defence and the prejudice to both sides.

Equally, a possible defence does not guarantee an extension. A respondent who ignores the deadline, delays after discovering the problem, provides no proper explanation and disrupts the proceedings may face serious difficulty.

The practical message is that respondents should not treat extension as a safety net. It is an application for discretionary relief.

Merits and prejudice

A respondent applying late should expect the Tribunal to ask whether there is a real defence.

That does not mean the Tribunal conducts the final hearing at the extension stage. It means the respondent needs to show more than a general wish to contest the claim.

A draft ET3 matters because it shows the proposed defence. It allows the Tribunal and claimant to see what is actually disputed. It also helps the Tribunal assess whether refusing an extension would shut out a respondent with a real answer to the claim, or whether the proposed response is weak, evasive or unsupported.

The Tribunal will also consider prejudice to both sides.

For the claimant, a late response may cause delay, uncertainty, extra work, wasted preparation, disruption to hearings, or loss of procedural progress already made. If judgment has already been issued under Rule 22, reopening the case may create further prejudice.

For the respondent, refusal of an extension may mean losing the opportunity to defend liability, challenge remedy, raise jurisdictional points, or pursue an employer’s contract claim.

The question is not whether one side is inconvenienced. Litigation often causes inconvenience. The question is what injustice would be caused by allowing or refusing the late response.

Rule 22: what happens if no accepted response is in play

Rule 22 is the main consequence when no accepted response is in play.

If no response has been received in time, or the response has been rejected and no reconsideration application remains to be determined, or the respondent says that no part of the claim is contested, the Tribunal must consider what can properly be done on the available material.

That does not mean there is always an automatic judgment in the claimant’s favour on every issue.

The Tribunal must decide whether the claim, or part of it, can properly be determined on the available material. If it can, judgment must be issued accordingly. If it cannot, a hearing must be fixed.

Rule 22 is still a serious procedural consequence. A respondent without an accepted response may have lost the ordinary ability to defend the case fully.

Respondent participation after Rule 22 is engaged

A respondent is not necessarily invisible once Rule 22 is engaged. The respondent must receive notice of hearings and decisions.

But participation is restricted.

The respondent may participate only to the extent permitted by the Tribunal. That may matter at a hearing fixed because the Tribunal cannot properly determine the claim or part of it on the available material. It may also matter where remedy, compensation, deductions, mitigation, interest or other issues still need evidence.

A respondent should not assume it can simply turn up and defend everything as if an ET3 had been accepted. Permission matters.

A claimant should not assume the respondent will be excluded from everything. The Tribunal may allow limited participation where that is necessary to determine issues fairly.

The correct position is controlled, not absolute.

What if judgment has already been issued?

If judgment has already been issued under Rule 22 and the Tribunal later grants an extension of time for the respondent’s response, the judgment must be set aside and the no-response regime falls away.

That is important, but respondents should not treat it as a strategy.

The key decision is whether the extension should be granted. If it is granted, setting aside follows as a procedural consequence. But the respondent still has to persuade the Tribunal to grant the extension in the first place.

The practical lesson is that a respondent should not wait for Rule 22 judgment and hope to undo it later. The safer course is to file the ET3 in time or apply for an extension promptly and properly.

Reconsideration of a rejected response

If a response is rejected, the respondent may be able to apply for reconsideration.

The application should identify why the rejection was wrong or how the defect has been rectified. A respondent should not assume that the Tribunal will work out the argument for it.

If the rejection was caused by missing information or the wrong form, the respondent should fix the problem as clearly and completely as possible. If the response was rejected as late, the respondent may need to engage with the extension route as well.

Again, the safest rule is urgency. Rejection notices should be read immediately, not left in an inbox while the respondent decides what to do.

Employer’s contract claims

There is a further point for employers.

If the employer wants to bring a contract claim in the Employment Tribunal, that claim is tied to the response framework. It is not a casual afterthought to be raised later when convenient.

If an employer intends to bring a contract claim, that decision should be made before filing the ET3, not after the response deadline has passed.

That means a late, defective or rejected ET3 can create risk not only for the defence to the claimant’s claim, but also for any employer’s contract claim that should have been brought through the response.

This article should not become a separate guide to employer contract claims. The point is narrower: the ET3 may matter to both defence and counterclaim strategy.

Respondent checklist when an ET1 arrives

Claimant checklist where no ET3 is accepted

Claimants should also understand the no-response position.

If no ET3 has been accepted, check whether the Tribunal has received any late response, extension application or reconsideration application. If an extension application is served, consider whether to oppose it and give reasons within the permitted period.

A claimant should not assume that no ET3 automatically means every requested remedy will be granted. But the absence of an accepted response is still significant. It may narrow what the respondent can do and may allow judgment under Rule 22 where the Tribunal has enough material to determine the claim or part of it.

Practical conclusion

The ET3 is the respondent’s procedural gateway into the defended Employment Tribunal case.

A respondent who ignores the deadline, files late, files defectively, or fails to respond risks serious procedural consequences. The Tribunal may move into Rule 22, determine what can properly be decided on the available material, and restrict respondent participation.

A late response can sometimes be admitted. But the respondent must persuade the Tribunal. That usually means explaining the delay, acting promptly, showing a real defence, addressing prejudice and providing a draft response where required.

The safest approach is simple: when the ET1 arrives, treat the ET3 deadline as urgent. Calculate the date. Preserve the evidence. Take instructions. Prepare the response properly. Apply promptly if more time is genuinely needed.

Do not assume that silence, delay or a defective ET3 can be repaired later without consequence.