Received an ACAS Early Conciliation Letter — What Does It Mean?

Getting a letter or email from ACAS out of the blue can feel alarming, especially if you have never heard of them before. Take a breath — receiving this notification does not mean you are being sued or that you have done anything wrong. It simply means that someone (usually a current or former employee) is considering making a claim against you, and the law requires them to contact ACAS first before they can take that claim to an Employment Tribunal. This post explains exactly what is happening, what the deadlines look like, and what you should do next.

What does this actually mean?

ACAS stands for the Advisory, Conciliation and Arbitration Service. It is a government-funded body that helps resolve workplace disputes without the need for court proceedings. Under the Employment Tribunals Act 1996 (as amended), almost anyone who wants to bring an Employment Tribunal claim must first notify ACAS and go through a process called early conciliation — a voluntary attempt to reach a settlement before any formal claim is filed.

The notification you have received is called an EC1 form. It tells you that the individual named on the letter (the claimant) has registered a potential dispute with ACAS. An ACAS conciliator — a neutral third party — will contact both of you separately to see whether a settlement is possible. You are not obliged to engage, and choosing not to will not automatically go against you, but it is almost always worth at least having that conversation.

The types of claims that typically follow an early conciliation notification include:

• Unfair dismissal — where an employee believes they were dismissed without a fair reason or process
• Discrimination — claims under the Equality Act 2010 relating to protected characteristics such as age, sex, race, or disability
• Unpaid wages or holiday pay — claims for money the claimant believes they are owed
• Whistleblowing — where someone claims they were treated badly for raising a concern

At this stage, no claim has actually been filed. This is still the pre-claim stage, and many disputes are resolved here without ever reaching a Tribunal.

Do you need to act immediately?

Yes — time does matter here, even though you are not yet facing a formal claim. The early conciliation period typically lasts up to six weeks from the date ACAS contacts the claimant. During this window, the claimant's Tribunal deadline (usually one year for unfair dismissal claims, or three months for most other claims) is paused — this pause is called tolling. Once the conciliation period ends, that clock starts running again.

What this means practically is that if conciliation does not succeed, the claimant may be able to submit a formal Tribunal claim relatively quickly afterwards — sometimes within days. The earlier you understand your position, the better prepared you will be.

You should also be aware that anything you say or write during the conciliation process is legally privileged — meaning it generally cannot be used as evidence in Tribunal proceedings later. This makes early conciliation a relatively safe space to explore settlement.

Your next steps

1. Read the notification carefully. Note the name of the claimant, the ACAS case reference number, and any deadlines mentioned in the correspondence.
2. Gather your documents. Pull together any relevant records — the employment contract, payslips, disciplinary or grievance correspondence, and any notes from meetings with the individual. Do this now, while details are fresh.
3. Contact the ACAS conciliator. You will usually receive a call or email from the conciliator assigned to your case. Engaging does not mean admitting liability — it simply means you are willing to listen.
4. Consider your position honestly. Think about what happened and whether there are any weaknesses in how the situation was handled. A realistic view now will help you make better decisions throughout the process.
5. Seek legal advice. Even if you feel confident, a brief conversation with an employment solicitor can clarify your exposure and help you decide whether to settle or defend a potential claim.

When should you speak to a solicitor?

You should speak to an employment solicitor as soon as possible if any of the following apply:

• The potential claim involves discrimination, whistleblowing, or automatic unfair dismissal — these carry uncapped compensation in some cases
• The claimant is seeking a large sum of money or reinstatement to their role
• You are unsure whether your dismissal process or HR procedure was legally compliant
• You have received multiple notifications at the same time
• The situation involves sensitive information, such as a settlement agreement or a non-disclosure clause

Even if none of the above apply, a 30-minute conversation with a solicitor can save significant time, stress, and money further down the line. Many employment solicitors offer a free initial consultation for employers.

If you are not sure where to start, CaseBridger is a free tool that gives you instant AI-powered guidance tailored to your specific situation and can help connect you with a qualified employment solicitor — no jargon, no commitment, just clarity when you need it most.