A holiday has been booked and paid for, but due to medical reasons must now be cancelled. The company booked with offers a cancellation fee so that if a booking with them is cancelled, then a full refund will be issued less the initial deposit.
However, the business has demanded that a doctor's note be provided to prove there are medical grounds for the cancellation before they will issue the refund.
Is it legal for a private business to request a doctors note? All research I have tried to conduct on the subject deals with employers and employees, which is not relevant to this situation. This is with regards to UK law.