Self-Certification Forms for UK Businesses: When You Need One + Template

If you employ staff in the UK, you’ll almost certainly run into “self-certification” at some point - usually when someone phones in sick and you’re trying to manage payroll, statutory sick pay (SSP), and your records without turning a simple absence into a paperwork nightmare.

That’s where a self-certification form comes in. Used properly, it gives you a clear record of what the employee is saying, supports consistent absence management, and helps you administer SSP in a sensible, auditable way.

In this guide, we’ll break down what self-certification forms are, when you need one, what to include, and how to use them sensibly as a small business. We’ll also include a free self-certification form template you can copy and adapt.

What Is A Self-Certification Form (And What Is It For)?

A self-certification form is a short document your employee completes to confirm:

• they were unable to work due to sickness (or another health-related reason), and
• the dates their sickness started and ended (or is expected to end).

In most small business contexts, “self-certification” is primarily used for short-term sickness absence where the employee doesn’t need to provide a GP fit note (often called a “sick note”).

Why it matters for you as an employer is that it helps you:

• Support SSP decisions (and identify relevant dates);
• Keep consistent absence records (especially if you manage patterns like repeated Monday/Friday absences);
• Follow a fair process if absence becomes a capability or performance issue; and
• Reduce disputes about what was said and when.

It’s also worth noting what a self-certification form is not:

• It isn’t a medical diagnosis.
• It isn’t a substitute for medical advice.
• It isn’t a tool to “catch people out” - it should be part of a reasonable absence management process.

Most businesses build the self-certification process into their absence policy or Employment Contract paperwork so everyone knows what’s expected from day one.

When Do UK Businesses Need A Self-Certification Form?

You typically ask for a self-certification form when an employee is off sick for a short period and you want a written record to support SSP administration and HR record-keeping.

1) Sickness Absence Of 7 Calendar Days Or Less

In general, if the employee has been ill for 7 calendar days or fewer, they can usually self-certify their sickness rather than providing a fit note from a doctor.

From a practical standpoint, many employers use a self-certification form for any sickness absence lasting:

• 1 day,
• 2–3 days, or
• up to 7 days.

If you’re thinking “is it worth doing for just one day?”, it often is - especially in a small team where you need reliable records and consistent treatment across staff.

If you’re dealing with frequent short absences, it’s also helpful to have a clear sickness process backed by your broader approach to managing sick leave.

2) When You’re Assessing Statutory Sick Pay (SSP)

SSP eligibility depends on a few factors (including earnings thresholds and qualifying days), and employers should keep a reasonable record of the absence dates and the reason for absence.

A self-certification form helps you capture the key information you need to run payroll smoothly, without over-collecting medical details.

3) When Your Absence Policy Requires It

Even if the law allows self-certification, your internal policy may still require the employee to confirm the absence details in writing. This is common for businesses that:

• have shift-based work and need accurate records of “qualifying days”;
• pay occupational sick pay (above SSP) and need evidence to apply their enhanced policy; or
• want a consistent way to run return-to-work check-ins.

If you do require a form, make sure it’s communicated clearly and applied consistently to avoid employee relations issues.

4) When A Fit Note Starts Becoming Relevant

If the absence is longer than 7 days, employees will usually need a fit note. At that point, your self-certification form can still be useful for the first part of the absence, but it shouldn’t replace the fit note requirement.

Where things get tricky is when you’re unsure how to treat medical evidence - for example, whether you can challenge it, or whether a doctor’s note can be disregarded. If that’s the situation you’re in, it’s worth reading up on doctor’s sick notes and getting tailored advice early.

What Should A Good Self-Certification Form Include?

A good self-certification form is short, clear, and focused on what you actually need.

As a small business, the sweet spot is: enough information to manage absence and SSP, but not so much that you accidentally collect sensitive health data you don’t need.

Core Information To Include

• Employee name (and ideally employee ID or department if you use them).
• Dates of sickness (start date and end date, or confirmation they’re still unwell).
• Whether the employee worked at all during the period (helpful for partial shifts).
• General reason (keep this high-level; avoid pushing for specific diagnoses unless genuinely necessary).
• Confirmation statement that the information is true to the best of their knowledge.
• Employee signature and date (or an electronic confirmation process).

If you’re collecting signatures, it helps to understand what counts as a valid signature and record in a business context - legal signature requirements can vary depending on the document and how you’re executing it.

Optional (But Useful) Add-Ons For Employers

Depending on how your business runs, you might also include:

• Job role / shift pattern (useful for shift workers and qualifying days).
• Return-to-work declaration confirming they’re fit to resume duties, or that adjustments may be needed.
• Manager notes section (e.g. any adjustments agreed or follow-up needed).
• Trigger review tick box (e.g. “has the employee hit an absence trigger?”) - but be careful to apply any triggers fairly and consistently.

Be Careful With Medical Information (UK GDPR)

Health data is usually treated as “special category data” under UK GDPR and the Data Protection Act 2018. That doesn’t mean you can’t collect any health-related information - but it does mean you should collect the minimum you need, store it securely, and have a clear reason for processing it.

Two practical tips:

• Don’t ask for a detailed diagnosis unless you genuinely need it (for example, to consider workplace adjustments).
• Be clear about retention - absence records shouldn’t be kept forever without a lawful and sensible reason. A helpful reference point is your approach to data retention.

If you collect employee personal data, your internal documentation and notices should align with your overall privacy compliance approach, including your Privacy Policy (where relevant) and internal HR privacy information.

How To Use Self-Certification Forms In Practice (Without Creating HR Headaches)

Having a self-certification form template is helpful - but the real value comes from using it consistently and fairly.

Step 1: Decide When The Form Is Required

Set a clear rule, such as:

• self-certification required for all sickness absences of 1–7 days; and
• a fit note required for sickness beyond 7 days.

Keep it simple. Complexity usually creates inconsistent handling - and inconsistent handling is where disputes start.

Step 2: Make It Easy To Submit

For small businesses, the best process is usually one of the following:

• a fillable PDF that staff email to a dedicated HR/admin inbox;
• a form completed on return to work (printed and signed); or
• a digital form (HR platform or secure online form) that creates a timestamped record.

Whatever method you use, make sure it aligns with your internal IT and privacy approach. If staff are completing forms on work devices, your expectations may also sit alongside an Acceptable Use Policy.

Step 3: Run A Quick Return-To-Work Check-In

Many employers treat the form as part of a short return-to-work conversation. This doesn’t need to be intense - it can be a quick check-in to confirm:

• the employee is well enough to return;
• there are no ongoing risks or adjustments needed;
• work is handed over properly and priorities are clear.

This step is also useful if the employee has had repeated absences. You’re not “accusing” anyone - you’re managing capability and attendance in a structured way.

Step 4: Store The Form Securely And Limit Access

Self-certification forms are HR records that may contain health-related information. That means you should:

• store them securely (restricted folder or HR system);
• limit access to people who genuinely need it (e.g. HR/payroll);
• avoid sharing details with other staff; and
• have a retention plan (don’t keep them longer than necessary).

Step 5: Know When You Need More Than A Form

Sometimes a self-certification form won’t answer the real issue - for example:

• there’s a pattern of absence impacting the business;
• the employee’s role has health and safety implications;
• you may need occupational health input; or
• the absence may be linked to a disability and require reasonable adjustments.

In these situations, getting advice early matters, because the legal risks can increase quickly if the process isn’t handled fairly and consistently.

Free Self Certification Form Template (Copy And Paste)

Below is a free self-certification form template designed for UK employers. You can copy and paste it into a document, turn it into a PDF, or adapt it for an online form.

Important: This template is general information only and isn’t legal, HR, or tax advice. Your business may need tweaks depending on your industry, your sick pay policy, and how you handle personal data.

Free Self-Certification Form (UK) - Template

How To Adapt This Template For Your Business

Depending on your setup, you might adjust the template to:

• include your sickness reporting procedure (who to call, by what time);
• include a reference to your absence management policy and any trigger points;
• reflect your occupational sick pay rules (if you offer enhanced sick pay); and
• add a short privacy notice explaining how the data will be used and stored.

If your form is being signed and stored as part of your employment paperwork, it’s also worth making sure your contracts and policies line up - starting with a properly drafted Employment Contract and clear internal policies.

Key Takeaways

• A self-certification form is a simple way for employees to confirm short-term sickness absence, and it can help you administer SSP and keep accurate records.
• In most cases, self-certification applies to sickness lasting 7 calendar days or less; longer absences usually require a fit note.
• A good self-certification form should capture the key absence dates and a brief reason, without encouraging unnecessary medical detail.
• Because health information can be sensitive, you should store self-certification forms securely and keep them only as long as you need under your data retention approach.
• Using a consistent process (including return-to-work check-ins) helps you manage attendance fairly and reduces the risk of disputes.
• Our free self-certification form template is a helpful starting point, but it should be tailored to your business policies and compliance needs.

If you’d like help putting the right employment documents and policies in place (including sickness and absence processes), you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.