An ACAS Early Conciliation Certificate is an official document issued by the Advisory, Conciliation and Arbitration Service (Acas) when the Early Conciliation process has been completed in an employment dispute. It is a mandatory procedural requirement for most Employment Tribunal claims in England and Wales before a claim can be formally submitted.

The Early Conciliation process is designed to give employees and employers an opportunity to resolve disputes without the need for tribunal proceedings. It applies to a wide range of employment law issues, including unfair dismissal, discrimination, unpaid wages, redundancy disputes, and breach of contract claims.

Understanding what the certificate is, when it is required, and how it affects tribunal deadlines is essential for anyone considering bringing an employment claim.

What Is ACAS Early Conciliation?

Acas Early Conciliation is a free service intended to resolve workplace disputes before they reach an Employment Tribunal. It is governed by the Employment Tribunals Act 1996 (as amended) and supporting procedural rules.

Before most Employment Tribunal claims can be submitted, the claimant must notify Acas. An Acas conciliator will then attempt to help both parties reach a settlement.

The process is voluntary in terms of settlement, but mandatory in terms of starting most tribunal claims.

If the dispute is not resolved, Acas issues an Early Conciliation Certificate confirming that the requirement has been satisfied.

What Is an ACAS Early Conciliation Certificate?

An ACAS Early Conciliation Certificate is a formal reference document issued by Acas when Early Conciliation has ended.

It confirms one of the following:

• That Early Conciliation took place but settlement was not reached, or
• That Early Conciliation was attempted but did not proceed (for example, where one party declined to engage), or
• That the statutory requirement for Early Conciliation has been completed.

The certificate contains:

• A unique reference number (EC certificate number)
• The names of the parties involved
• The date the certificate was issued

This reference number must be included on an Employment Tribunal claim form (ET1).

Without it, most tribunal claims cannot proceed.

Why Is an ACAS Early Conciliation Certificate Required?

The certificate exists to confirm that the legal requirement to attempt conciliation has been satisfied before litigation begins.

The policy objectives include:

Encouraging Early Settlement

Many employment disputes are resolved without tribunal hearings. Early Conciliation provides an opportunity to reach agreement through negotiation.

Reducing Tribunal Workload

Employment Tribunals are intended for disputes that cannot be resolved informally. Early Conciliation filters out cases that can be settled.

Reducing Legal Costs and Delay

Resolving disputes early can reduce:

• Legal fees
• Time spent in proceedings
• Emotional and workplace disruption

When Is an ACAS Early Conciliation Certificate Required?

In most cases, an Early Conciliation Certificate is required before submitting an Employment Tribunal claim.

It applies to common claims such as:

• Unfair dismissal
• Discrimination claims under the Equality Act 2010
• Unlawful deduction of wages
• Holiday pay disputes
• Breach of contract claims (where brought in tribunal)
• Redundancy-related disputes

However, there are limited exceptions where Early Conciliation is not required, such as certain claims involving multiple respondents or where Acas has no jurisdiction.

In practice, most employment claims require a certificate.

How the ACAS Early Conciliation Process Works

The process typically follows these stages:

1. Notification to Acas

The claimant submits an Early Conciliation notification to Acas, providing basic details about the dispute and the employer.

2. Assignment of a Conciliator

An Acas conciliator contacts both parties to explain the process and explore whether settlement discussions are possible.

3. Conciliation Period

The conciliator may:

• Facilitate discussions between the parties
• Relay settlement offers
• Clarify legal issues informally
• Help explore resolution options

Participation is voluntary, but encouraged.

4. End of Conciliation

The process ends when:

• A settlement is reached, or
• Either party declines to continue, or
• The time limit expires

5. Issuing the Certificate

If the dispute is not resolved, Acas issues the Early Conciliation Certificate.

What Happens After the Certificate Is Issued?

Once the certificate has been issued, the claimant may proceed to file a claim in the Employment Tribunal.

The key requirements are:

• The certificate number must be included on the ET1 claim form
• The claim must be submitted within the applicable limitation period
• Tribunal rules and procedural requirements must be followed

The certificate itself does not mean the claim will succeed; it only confirms procedural compliance.

Time Limits and the Impact of Early Conciliation

Employment Tribunal claims are subject to strict time limits, typically:

• Three months less one day from the date of dismissal or the act complained of

However, Early Conciliation affects these deadlines.

When Early Conciliation is started:

• The limitation clock is paused (known as “stopping the clock”)
• A new adjusted deadline is calculated after the certificate is issued

This system ensures that claimants are not disadvantaged while attempting settlement.

Failure to comply with time limits can result in a claim being rejected, even if it has merit.

What Information Is Included in the Certificate?

An ACAS Early Conciliation Certificate contains:

• A unique EC reference number
• The name of the prospective claimant
• The name of the respondent (employer or organisation)
• The date of issue

It does not include:

• Details of the dispute
• Evidence or legal arguments
• Any findings or conclusions

The certificate is purely procedural.

What If the Employer Refuses to Engage?

Employers are not legally required to settle during Early Conciliation.

If an employer refuses to participate or declines settlement discussions:

• The conciliator will still issue a certificate
• The claimant can proceed to tribunal
• The refusal to engage may later be relevant to costs or conduct in proceedings

Early Conciliation does not force agreement; it only provides an opportunity for it.

Can a Settlement Be Reached During Early Conciliation?

Yes.

If both parties agree, a legally binding settlement can be reached through an ACAS COT3 agreement.

A COT3 agreement may cover:

• Financial compensation
• Termination terms
• References
• Confidentiality clauses
• Non-disparagement terms

Once agreed, a COT3 is legally enforceable and usually prevents further tribunal proceedings on the same issue.

What Happens If You Do Not Obtain a Certificate?

If a claimant submits an Employment Tribunal claim without an Early Conciliation Certificate:

• The tribunal will usually reject the claim
• The claim may be struck out
• The claimant may be required to restart the process

This can be particularly problematic where limitation periods have expired, making compliance essential.

Exceptions to Early Conciliation Requirements

There are limited situations where a certificate is not required, including:

• Claims involving multiple respondents where only some are subject to conciliation
• Certain claims where Acas has no jurisdiction
• Claims that are legally exempt under specific procedural rules

However, these exceptions are narrow, and most claims still require a certificate.

Does Early Conciliation Affect the Strength of a Case?

No.

Early Conciliation is not a legal assessment of the merits of a claim.

It does not determine:

• Whether a claim is valid
• Whether evidence is strong or weak
• Whether compensation is payable

Its purpose is procedural and conciliatory, not judicial.

Can Early Conciliation Be Reopened?

In some circumstances, further conciliation may occur if:

• Both parties agree to continue discussions
• Settlement negotiations are ongoing
• Additional time is required before issuing the certificate

However, once a certificate is issued, the formal Early Conciliation process is considered complete.

Common Misunderstandings About ACAS Early Conciliation Certificates

“The certificate means I have a strong case”

Incorrect. It only confirms procedural completion.

“I must settle during Early Conciliation”

Incorrect. Settlement is voluntary.

“The employer is legally required to negotiate”

Incorrect. Participation is encouraged but not mandatory.

“I cannot go to tribunal without agreement”

Incorrect. The certificate enables tribunal access; it does not require settlement.

Practical Steps After Receiving a Certificate

Once an Early Conciliation Certificate has been issued, a claimant will typically:

• Check tribunal limitation deadlines
• Prepare and complete an ET1 claim form
• Gather supporting evidence
• Identify legal issues and remedies sought
• Ensure the EC reference number is included on the claim

Strict adherence to deadlines is essential.

Summary

An ACAS Early Conciliation Certificate is a mandatory procedural document issued by Acas confirming that the Early Conciliation process has been completed. It is required for most Employment Tribunal claims in England and Wales and acts as a gateway to formal legal proceedings.

The certificate itself does not determine the outcome of a dispute. Instead, it confirms that parties have had the opportunity to resolve the issue informally before tribunal action begins. Early Conciliation can lead to settlement through a COT3 agreement, but if no agreement is reached, the claimant may proceed to tribunal using the certificate reference number.

Understanding the role of the certificate, how it affects limitation periods, and how it interacts with tribunal procedures is essential for anyone involved in an employment dispute.