UK Employment Tribunal ET3 Employer Response

The situation

Deepa, 44, owns a 9-person café-bakery group in Leeds. A dismissed shift manager files an ET1 alleging unfair dismissal and disability discrimination. The tribunal letter gives Deepa 28 days to file an ET3 "response", a document she has never heard of. Her accountant can't help. A local employment solicitor quotes £7,500 to take the case to conciliation, more if it reaches hearing. ACAS calls about early conciliation but tells her, correctly, that they cannot advise her whether the dismissal was fair or what to write. If she misses the 28 days, the tribunal can enter default judgment, she loses without being heard. What she doesn't know: her dismissal followed a documented misconduct process, which under the Burchell test and the band of reasonable responses is a strong defense, if pleaded in the right structure; and the claim form's early-conciliation dates may put part of the claim out of time, a jurisdictional objection that must be raised in the ET3 or is effectively waived.

Who receives this

UK employers with 1–20 employees and no HR function, hospitality, retail, trades, care agencies, small professional practices, served with an ET1. Roughly 100k ET claims/year are received; the respondent side below ~50 employees is predominantly unrepresented at the ET3 stage or pays £5k–£20k to solicitors. Secondary: bookkeepers and outsourced-payroll firms whose clients forward tribunal letters to them.

Why the agency will not advise you

The tribunal service cannot coach respondents. ACAS is statutorily neutral. The productized legaltech in this proceeding (Valla) is structurally claimant-side, its brand and content are built on fighting employers, so it cannot credibly serve them. Employer-side incumbents (Peninsula, Croner) sell annual HR-protection retainers at £100–£300/month and have no incentive to sell a one-time £99 self-serve response. The per-case, deadline-triggered, self-serve slot is empty.

Key facts, with sources

• An employer served with an employment tribunal claim must respond on form ET3 within 28 days of the date the tribunal sent the claim copy; responding online via the Employment Tribunals response service is the default route, and failure to respond in time can lead to a default judgment. The gov.uk process pages and the response portal explain the mechanics but provide no drafting guidance on grounds of resistance. Source: Respond to a claim made to an employment tribunal: Form ET3 — GOV.UK · Employment Tribunals response service — GOV.UK · Being taken to an employment tribunal — GOV.UK
• The claimant side of this proceeding is served by a productized legaltech platform, Valla offers a free core platform (evidence and issue tracking, claim assessment, webinars) plus paid templates (grievance letters through ET1 particulars of claim) and coaching with legal experts, while no equivalent respondent-side self-serve product exists; employer-side content is published by HR consultancies (Peninsula, DavidsonMorris) as marketing for human retainer services. Source: Smart Employment Tribunal Representation | Tools and Guidance — Valla · What is an ET3 in Employment Tribunal? — Valla · How to Respond to an Employment Tribunal Claim — Peninsula UK
• Employment tribunal claim volume is high and rising post-fee-abolition (roughly 100k claims/year received by ET in recent Ministry of Justice quarterly statistics, labeled approximate here), and 2024–25 procedural rule changes moved ET1/ET3 filing online by default, increasing the share of unrepresented small-employer respondents interacting directly with the portal. Source: Employment Tribunal New Rules 2025: ET1 & ET3 Filing — Davenport Solicitors · ET3 Employment Tribunal Response Form Guidance (England & Wales 2026) — UKLegalGuides

When to bring in a professional

Self-serve responses fit routine cases: clear facts, amounts a business can absorb, and a deadline still ahead of you. Bring in a licensed professional when the amount at stake is large relative to their fee, the facts are genuinely disputed, criminal exposure is possible, or the deadline has already passed. A short paid consultation to sanity-check your plan is often worth it even when you handle the filing yourself.

All sources for this guide

1. Respond to a claim made to an employment tribunal: Form ET3 — GOV.UK
2. Employment Tribunals response service — GOV.UK
3. Being taken to an employment tribunal — GOV.UK
4. Smart Employment Tribunal Representation | Tools and Guidance — Valla
5. What is an ET3 in Employment Tribunal? — Valla
6. How to Respond to an Employment Tribunal Claim — Peninsula UK
7. Employment Tribunal New Rules 2025: ET1 & ET3 Filing — Davenport Solicitors
8. ET3 Employment Tribunal Response Form Guidance (England & Wales 2026) — UKLegalGuides