Refundable tickets fake medical certificate

Hypothetically speaking… if you bought refundable tickets for a concert you could no longer attend and went to the doctors to get a written diagnosis for your condition that is preventing you from attending than used ChatGPT to add a sentence to that medical document saying you couldn’t attend the concert on such and such date because of the above diagnosis and the ticket master person asked for you doctors practice email to confirm documents. Would they just confirm the doctor works there or confirm the medical certificate they received is the same that was issued. And if they do confirm the medical certificate and discover it was faked would they take the person to court for fraud or just let it go maybe??

This is purely hypothetical and just curious of what would happen if this situation were to occur.