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Medical certificate

Professionally updated: January 12, 2026

A medical certificate is a statement from a doctor that officially documents that a person is unable to perform their work or daily duties due to illness. It is an important document that ensures patients receive the necessary rest and treatment, while also informing employers of the absence.

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Jakob Fraes
Specialist in General Medicine, Ph.D.
Read more about Sick leave certificate. Everything you should know.

What is a duration certificate?

The certificate is a specific type of sick leave that indicates the expected duration of the illness. It provides a timeframe for when the patient is expected to return to work. This helps both employers and patients to plan and adapt to the situation.

How do you get a sick note?

To get a sick note, you need to book an appointment with Doctors in Denmark or the general practitioner you are being treated by. The doctor will assess your condition and determine if sick leave is necessary. If so, the doctor will fill out the necessary paperwork and give you a copy.

When do you need a sick note?

It is typically necessary to have a sick note if you are absent from work for more than a couple of days due to illness. However, the rules vary from workplace to workplace, so it is important to know your employer's policy on sick leave.

What should you do after receiving a sick note?

Once you have received your sick note, be sure to inform your employer of your condition and the expected duration of your absence. Many employers require you to send a copy of the sick note so they have it for their records.

What rights do you have when on sick leave?

When you are on sick leave, you have the right to take the necessary time to recover. You are protected from unjustified dismissal due to illness, and you may also be entitled to sick pay depending on your employment contract and the country's social security schemes.

How should one manage a long-term illness?

In the case of long-term illness, it's important to stay in close contact with both your doctor and employer. Your doctor can revise your certificate if your health doesn't improve as expected. It's also crucial to know your rights and obligations in relation to your employer, as further documentation or conversations about your future at work may be required.

After reading the above information, you are now ready to book an appointment with your doctor if you need a sick note. We are here to help and ensure that you receive the best care and advice.

Frequently asked questions about sick leave

Do I always need a sick note if I am ill?

No, typically a sick note is only required if you are absent from work for more than a couple of days. However, it is important to know your employer's policy regarding sick leave.

How do I book an appointment to get a sick note?

You can book an appointment with your general practitioner or the doctor you are seeing for treatment. When you visit the doctor, he/she will assess your condition and determine if a sick note is necessary.

Can my employer reject my sick leave?

An employer cannot reject an official sick note from a doctor. However, they can request further documentation or a second opinion if they have reason to believe that the sick note is not justified.