Can an Ex Employee Raise a Grievance? Here’s What Employers Need to Know
It’s a question many employers ask: Can an ex employee raise a grievance? The short answer is yes—but that doesn’t mean you have to panic. At EBS Law, we regularly advise businesses dealing with post-employment grievances. Whether it’s a complaint about the way someone was dismissed or a retrospective issue being raised months later, it’s important to understand your legal position and respond appropriately.
Understanding Grievances After Employment Ends
Typically, grievances are raised while an individual is still employed. However, that doesn’t mean the door is closed once their employment ends. Under UK employment law, ex-employees do have the right to raise concerns about their treatment—particularly if those concerns relate to potential unlawful discrimination, breach of contract, or unfair dismissal.
Employers often assume the issue ends once someone leaves the business. Unfortunately, that’s not always the case. Knowing how to respond professionally and legally to post-employment grievances can help you avoid unnecessary disputes or costly claims.
Why Would an Ex Employee Raise a Grievance?
There are several reasons why a former employee may decide to raise a grievance after leaving:
- They believe they were unfairly dismissed.
- They were unaware of their rights during employment.
- They want to raise a concern that wasn’t addressed at the time.
- They are preparing for an employment tribunal claim and wish to show they attempted resolution first.
Even if they no longer work for you, grievances should not be ignored—especially if the individual is claiming unlawful treatment. In fact, ACAS guidance recommends attempting to resolve workplace disputes informally where possible, even after employment ends.
Is There a Legal Obligation to Respond?
So, can an ex employee raise a grievance and force you to respond? Technically, employers are not legally obliged to follow their internal grievance procedure for ex-employees. However, if the grievance relates to issues such as discrimination or whistleblowing, failing to respond could work against you—especially if the matter ends up before a tribunal.
The Employment Tribunal will expect employers to have acted reasonably. A sensible, considered written response (even if brief) can help demonstrate your professionalism and reduce the risk of further claims.
What Should Employers Do If They Receive a Grievance Post-Employment?
If you do receive a grievance from an ex-employee, here’s a simple process to follow:
- Review the issue carefully – understand the nature of the complaint and when it occurred.
- Respond in writing – acknowledge the grievance and outline whether you are willing to investigate further.
- Seek legal advice – if the grievance relates to a legal matter (e.g. discrimination), speak with an employment law specialist.
While you’re not required to conduct a full grievance hearing, offering a reasonable explanation can often defuse tensions and show you acted responsibly. It may even prevent a tribunal claim from being lodged.
Can an Ex Employee Raise a Grievance Months After Leaving?
Yes, and this can take employers by surprise. There’s no formal time limit for submitting a grievance, although employees must usually begin the Early Conciliation process via ACAS within three months of the issue occurring if they wish to take the matter further legally.
If you’re contacted about something that happened six months ago, you’re entitled to ask why the matter is being raised now. However, it’s still wise to take the issue seriously and consider your response carefully.
If you would like free advice, John Bloor and the team are here to help. Call John today on 01625 874400 or email enquiries@ebslaw.co.uk for tailored support.
How Does This Differ from a Subject Access Request (SAR)?
Occasionally, ex-employees may submit a grievance alongside or instead of a data request under GDPR. It’s important to distinguish between the two. A grievance is a complaint about treatment—whereas a SAR is a legal request to access their personal data.
Both should be handled with care, and employers must meet legal obligations under data protection law. If you’re unsure about how to respond to either, get expert legal guidance before replying.
Can This Lead to an Employment Tribunal Claim?
Sometimes, a post-employment grievance is the first step toward legal action. If an individual feels their grievance wasn’t taken seriously or handled fairly, they may proceed with a claim for:
- Unfair dismissal
- Constructive dismissal
- Discrimination or harassment
- Wrongful dismissal or breach of contract
This is why we always recommend documenting your response and ensuring it’s aligned with best practice—even if the matter appears minor. If a claim does proceed, your response to the grievance may become part of the tribunal evidence.
How EBS Law Can Support You
At EBS Law, we work exclusively with UK employers, helping you handle tricky issues like this with clarity and confidence. From reviewing your grievance response to representing you at tribunal, we’re here to protect your business every step of the way.
We can also help you update your contracts and grievance policies to make sure they provide clarity around post-employment disputes—something many businesses overlook until it’s too late.
Contact John Bloor today for expert support at EBS Law. We’re here to ensure your business stays protected and every step of the way. Call 01625 874400 or email enquiries@ebslaw.co.uk.
Further Guidance for Employers
For more helpful guidance and expert legal insights, read these recent articles from EBS Law:
- Settlement Agreement Discussions – explains how post-employment complaints may be addressed via exit negotiations
- Redundancy Consultation Process UK Employers Guide – includes context on complaining after redundancy and procedural fairness