But further to that I would look for a medical report if it was a medical reason. Otherwise I mean if they are well enough to come here they are well enough to do your course It’s very cheeky. I hope you aren’t giving a refund.
So this person used your course to apply for the visa and now that they got it don’t want your course anymore? No I would not be giving a refund. ( unless ok you are a Muay Thai gym and the person has since lost a fricken arm or something). Otherwise no.