If you have been unwell in the run-up to a cruise, you may be asked about your symptoms at the terminal, and some cruise lines will refuse boarding if they see signs of an infectious illness.
A fit-to-cruise certificate from a doctor confirms you are in good health and fit to travel.
This guide explains what cruise lines ask before boarding, what a fit-to-cruise certificate confirms, when to get one, and how expedition cruises to Antarctica and the Arctic differ.
Key Takeaways
- A fit-to-cruise certificate is a doctor-signed letter confirming you are in good health and fit to travel by cruise ship.
- Cunard asks passengers to declare respiratory or gastrointestinal symptoms from the 3 days before embarkation, followed by a medical screening.
- Norovirus laboratory reports in England were 30.5% above the 5-season average in late February 2026, according to UKHSA.
- Antarctic and Arctic expedition operators usually require their own medical form, signed by a doctor if you have a medical condition or take prescription medication.
- If illness makes you miss your cruise, your travel insurer will usually ask for medical evidence.
What Does a Fit-to-Cruise Certificate Need to Say?
A fit-to-cruise certificate needs to confirm your name and date of birth and state that you are in good health and fit to travel by cruise ship. It must be signed by a doctor who has reviewed your medical history, with the doctor’s or clinic’s contact details so the cruise line can check it.
A certificate from ZoomDoc includes:
- Your name and date of birth
- A statement confirming you are in good health and fit to travel
- The signature and authorisation of one of our GMC-registered UK doctors
- Contact details of ZoomDoc Health, with a QR code enabling a verification check
Some cruise lines have their own medical form instead of, or as well as, a letter. Your booking documents will tell you which they need.
Which Situations Mean a Cruise Line Will Ask For a Fit-To-Cruise Certificate?
Cruise lines most often ask for medical confirmation when you have recently been ill, have a long-term medical condition, or are pregnant. What they want to know differs in each case, so it helps to have the right information ready before you apply.
| Situation | What the cruise line wants to know | What the doctor confirms | What to have ready |
| Recent stomach bug | That you are no longer infectious | You have recovered and are fit to travel | When your symptoms started and stopped |
| Recent respiratory illness | That you are well enough to travel and unlikely to spread infection | You have recovered and are fit to travel | When your symptoms started and stopped |
| Long-term medical condition | That your condition is stable enough for a voyage | You are fit to travel with your condition | Your Summary Care Record, including current medications |
| Pregnancy | How many weeks pregnant you will be on the voyage | Your estimated delivery date and gestation when you embark | Your pregnancy details. Many cruise lines do not allow boarding from 24 weeks, so see our pregnancy fit-to-cruise certificate |
Will I Be Turned Away at the Terminal If I’ve Had a Stomach Bug Before My Cruise?
Not automatically. Most cruise lines ask passengers to complete a health questionnaire at check-in.
If you declare recent symptoms of a stomach bug, you may be referred for a medical screening, and some cruise lines will deny boarding if symptoms of an infectious illness are documented. The final decision rests with the cruise line.
Policies vary by cruise line. For example:
- Cunard asks passengers to declare symptoms of acute respiratory or gastrointestinal illness in the 3 days before embarkation. Its onboard medical team then carries out a secondary screening to decide whether you are fit to travel.
- Royal Caribbean asks passengers to complete a health questionnaire before boarding. A positive test result or documented symptoms of communicable disease during boarding results in denial of boarding.
Norovirus, sometimes called the winter vomiting bug, is a common cause of stomach bugs in the UK. It causes sudden vomiting and diarrhoea, and spreads easily through close contact, contaminated surfaces and food.
People are most infectious from when symptoms start until 48 hours after they stop, which is why cruise lines watch closely for it on board. UK Health Security Agency data showed norovirus laboratory reports in England between 16 February and 1 March 2026 were 30.5% higher than the 5-season average for the same period.
NHS advice is to stay off work or school until you have had no vomiting or diarrhoea for two days. Your cruise line may apply different boarding rules, so check with it if you have recently been ill.
A fit-to-cruise certificate issued after your recovery gives the cruise line’s medical team clear evidence to consider at screening.
Does an Antarctica or Arctic Cruise Need a Doctor to Sign The Medical Form?
Usually, yes. Expedition cruises to Antarctica and the Arctic travel far from hospitals, so operators ask for a detailed medical form. Quark Expeditions, for example, requires a completed medical form to join, and a doctor must sign it if you have a listed condition or take prescription medication.
Expedition medicals are planned pre-departure assessments, separate from certificates requested after an illness. They help operators assess whether passengers are fit for remote travel, shore landings and expedition activities. Arrange yours before final payment where your operator’s assessment window allows, and check its medical submission deadline.
Our Expedition Cruise Medical includes your expedition fit-to-cruise certificate, and our doctors complete, sign and stamp any cruise line specific medical forms as part of the service. For more on what polar travel involves, read why Antarctic cruises need a medical certificate.
What are My Options If My GP Won’t Sign My Cruise Medical Form?
Fit-to-cruise certificates and cruise line forms are private, non-NHS work, so some GP surgeries do not sign them, and others can only fit them in around NHS appointments. You can apply online through a regulated private doctor service instead.
At ZoomDoc, the average turnaround is 1 hour, with no appointment needed. Our NHS and GMC-registered doctors validate your medical evidence online:
- Complete your order online – You will receive a unique certificate booking reference to upload your medical evidence.
- Upload a video and complete a questionnaire – Your video should be 30 seconds to 1 minute long, explaining why you need the certificate. Upload it with your digital Summary Care Record by 9 pm for same-day service.
- Add your cruise details – Tell us the name of your cruise ship and your destination.
- Our doctor validates your evidence – Our doctors review evidence between 9am and 9 pm GMT, seven days a week, and may call you if they have any questions.
- Receive your certificate – Your verifiable digital certificate is sent by email and SMS.
You will also need a photo of your passport or driving licence, and details of your regular doctor if you have one. Your Summary Care Record can usually be requested from your GP surgery reception, or accessed through the NHS App if it is linked to your surgery.
How Soon Before Sailing Should I Get My Fit-To-Cruise Certificate?
It depends on why you need it. After a recent illness, get your certificate once you have recovered, as cruise lines ask about symptoms in the days before embarkation.
Check whether your cruise line requires a more recent assessment or its own form, particularly if your health changes before sailing.
A ZoomDoc fit-to-cruise certificate is valid for 180 days from the date of issue. If you have a long-term condition, that means you can arrange it well ahead of your departure date.
For expedition cruises, check the deadline for medical forms in your booking documents, so you have time to get them signed.
What Evidence Will My Travel Insurer Want If I Missed My Cruise Because I Was Ill?
Your travel insurer will usually want medical evidence confirming you were too unwell to travel, and when your illness started. A doctor’s letter that sets out your illness and its impact on your travel plans can support your claim.
Check your policy for its deadline for submitting evidence. A travel and holiday cancellation certificate confirms your illness and its impact on your travel plans. If your cruise line documented a denial of boarding, keep that record with your claim too.
How Do I Make Sure I’m Cleared To Board?
A fit-to-cruise certificate is most useful after a recent illness, with a long-term condition, during pregnancy, or before an expedition cruise. If you have been unwell, get it once you have recovered, and declare your symptoms honestly at check-in.
If you need a certificate, ZoomDoc’s GMC-registered doctors can review your medical evidence online and issue one where clinically appropriate. Contact us to get your fit-to-cruise medical certificate online, without the hassle of booking an appointment.
FAQs
Will a cruise line accept a certificate from an online doctor?
A certificate signed by a GMC-registered UK doctor is valid whether the assessment took place online or in person. The QR code on a ZoomDoc certificate links to a secure portal where the cruise line can confirm it is genuine at any time.
Can ZoomDoc complete my cruise line’s own medical form for a standard cruise?
Yes. Send us your pre-filled form and our doctors can review, sign and stamp it for an additional £25.
How much does a fit-to-cruise certificate cost?
Our fit-to-cruise medical certificate is currently £49. Our Expedition Cruise Medical for Antarctica and the Arctic is currently £75, including any cruise line-specific forms.
What happens if the doctor can’t issue my certificate?
A doctor may call you to ask for more information first. If the medical evidence does not support a certificate, we will not issue one, and you will receive a full refund.
What happens if I get ill during the cruise?
Report your symptoms to the ship’s medical centre as soon as possible. On some cruise lines, such as Royal Caribbean, medical staff can see you in your cabin or by video consultation. Treatment on board is usually charged, so check what your travel insurance covers before you sail.
Does a fit-to-cruise certificate replace travel insurance?
No. A certificate confirms you are fit to travel. Travel insurance covers costs if you are unable to travel or need treatment during your cruise. Declare any medical conditions to your insurer when you buy your policy.
Is a fit-to-cruise certificate the same as a fit-to-fly certificate?
No. Airlines and cruise lines set their own requirements. If you are flying to join your ship, check what both need. ZoomDoc also provides fit-to-fly certificates, including for pregnancy and chickenpox recovery.