I'm a semi-pro musician.
Earlier in the year I was asked to do a recording session, over 2 hours away for someone I'd never met. The rep from the management company who booked me promised expenses were covered - I knew and trusted him so of course I agreed.
It cost me roughly 100 quid to travel up, and I had to take a day off work to do it. During the session receipts for travel were mentioned and the artist in referred several times to taxi costs which he said he'd be paying. I was also booked to attend a meeting a week later with a record label, where it transpired that what I'd been told about the project wasn't entirely true, and so a showcase we'd been preparing for was cancelled.
Of course I then asked the artist for the money to cover my expenses (he got the session for free) and he said that expenses would only paid once he'd signed the deal, and proceeded to claim that he'd never personally agreed that my costs would be covered.
Several months have passed and I've still not had my money or any contact from the artist