A fit note can have a big effect on your income, work arrangements and confidence at a time when you are already unwell. If you feel the note does not reflect what you can manage, or it says you are fit for work when you are not, knowing how to challenge a fit note decision can help you take the next step without feeling fobbed off.
The key point is that a fit note is medical evidence, not a final decision about your job or benefits. Your GP, hospital doctor, nurse, occupational therapist, physiotherapist or other eligible healthcare professional gives their clinical opinion. Your employer and the Department for Work and Pensions (DWP) may then make their own decisions using that evidence alongside other information.
First, be clear about what you disagree with
Fit notes usually say either that you are not fit for work or that you may be fit for work, subject to changes such as altered hours, amended duties, workplace adaptations or a phased return. Sometimes the problem is not the main box ticked, but the detail left out.
For example, a note may say you could return with adjustments, but you know your employer cannot safely provide them. It may give an end date that is too soon, fail to explain fluctuating symptoms, or use wording that does not match the reality of your condition. You might also feel that a clinician has focused on one diagnosis while overlooking pain, fatigue, mental health, medication side effects or the impact of several conditions together.
Before contacting the practice, write down exactly what is wrong. Keep it practical. Explain what you cannot reliably do, how often symptoms affect you, what happens when you push through, and why the suggested adjustments are not enough or are not available.
Ask the healthcare professional to review the fit note
There is no formal appeal tribunal for a fit note itself. Usually, the first and most useful route is to ask the clinician or GP practice for a review. Contact the surgery promptly and say that you believe the fit note does not accurately reflect your health or ability to work.
You can ask for another appointment, which may be by telephone, video or in person. If speaking is difficult, ask whether you can provide information in writing, use an interpreter, bring someone for support or request another reasonable adjustment. You do not have to explain everything perfectly in one go. A short written timeline can help you remember the important points.
At the appointment, focus on functional impact rather than feeling you have to prove how ill you are. You could explain that you cannot sit for more than a certain period because of pain, that your concentration drops after medication, or that your symptoms are unpredictable and you cannot safely commit to fixed shifts. Be honest about better days too, while explaining whether those better days are reliable and what they cost you afterwards.
The clinician may agree to issue a new fit note, amend the dates or add more useful comments. They may not agree, and they are not required to write a note in the exact words you request. But they should listen to relevant information and make a decision based on an up-to-date clinical picture.
Take useful evidence, but do not delay asking for help
Evidence can strengthen your request, particularly if your condition has changed or the original consultation was brief. This could include hospital letters, a treatment plan, a list of medication and side effects, a symptom diary, or notes from a specialist, therapist or mental health team.
If you are saying that work adjustments will not make the job possible, it can also help to bring a clear description of your role. Include tasks, working hours, travel, lifting, computer use, customer contact or other demands that affect you. An employer’s occupational health report may be relevant, but it does not replace the clinician’s medical judgement.
Do not wait for every possible document before seeking a review. Explain what you have now and ask the practice to consider any further evidence when it arrives.
If the practice will not change the decision
It is frustrating to leave an appointment feeling unheard. If the clinician does not amend the note, ask them to explain their reasoning. You may learn that they believe a particular adjustment could make work possible, or that they need more information before changing their view. A clear explanation gives you something specific to respond to.
You can ask to see another clinician at the practice for a second opinion, although this is not always available quickly and the second clinician may reach the same view. It is reasonable to say that you do not feel the note reflects the evidence or that communication broke down during the appointment.
If you believe the service you received was poor, you can make a complaint to the GP practice. Start with the practice manager and set out what happened, what you are unhappy about and what outcome you want. That might be an explanation, a review by another clinician, an apology or changes to how the practice handles communication and accessibility.
If the practice’s response does not resolve matters, you may be able to take the complaint further through the NHS complaints process. Complaints are about the care or service you received. They are not a quick route to obtaining a replacement fit note, so it is often best to pursue a clinical review at the same time where possible.
A fit note is not the same as a DWP work capability decision
This distinction matters. If you claim Universal Credit or Employment and Support Allowance (ESA), you may be asked to provide fit notes while the DWP considers your health condition. Eventually, you may have a Work Capability Assessment (WCA). The outcome can affect whether you are found fit for work, have limited capability for work, or have limited capability for work and work-related activity.
You cannot overturn a WCA outcome simply by challenging the fit note. Equally, a fit note saying you are not fit for work does not automatically guarantee a particular WCA result. The DWP looks at its own legal tests, which can feel deeply unfair when they do not match everyday reality.
If you disagree with a benefit decision, check the decision letter straight away. You will usually need to ask for a mandatory reconsideration before you can appeal. Fit notes, medical letters and a detailed explanation of how your condition affects specific activities can all be useful evidence, but make sure your challenge addresses the reasons the DWP gave.
Speak to your employer early, if it feels safe to do so
Where a fit note says you may be fit for work, the employer should discuss the suggested changes with you. They do not have to create a role that does not exist, but they should properly consider reasonable adjustments if you are disabled under the Equality Act 2010.
This may include altered hours, home working, equipment, extra breaks, changes to duties, a quieter workspace or a phased return. What is reasonable depends on your role, your needs and the employer’s resources. A suggestion that works for one person may be useless or unsafe for another.
If agreed changes cannot be made, the fit note can generally be treated as though it says you are not fit for work for that period. Put important conversations in writing afterwards, even if it is just a brief email confirming what was discussed. This can prevent misunderstandings later.
Look after yourself while you deal with it
Challenging a decision can take energy you may not have. Take one step at a time: ask for the review, keep copies of notes and letters, and get support if the process becomes overwhelming. A trusted person can help you prepare what to say or sit with you while you make the call.
You deserve to be taken seriously when a fit note does not reflect your real life. Keep your account specific, truthful and centred on what your health means for day-to-day functioning. Real talk for real people: you are not being difficult by asking for a decision to be looked at again.