This happenned to me quite a few times. If it's the model's fault, she is out, and if it's the organiser's fault he/she is out just as fast.
Some example of problems and situations I faced in Singapore.
I hired a blonde and a brunette showed up.
Nude to me means nude, not hands over breasts all the time, nor wearing a g-strings, that is topless, not nude.
A white dress means white, not beige, not yellowish white from years of washing.
4 inch heels is high, if model cannot take it, tell me, don't come with something along the line of 2 inch, does not cut it.
Make up artist late by 90 moinutes, who pays the model while she sits around? Granted, model was nice and fun, we smoked a pack of cigs, play cards, drank a beer or 2 waiting, but clock is ticking.
Bikini, my pet peeve. Bikini means a bikini. No need to define for everyone here, but unfortunately, it seems many organisers and models have different definations for bikini. A halter top, a crop top, a rolled up tank top, boy shorts, short shorts, mini skirt, micro mini skirts, none of these, to the best of my knowledge and understnading, is part of the "bikini". And yet, can't count how many times I had to deal with this misunderstanding!
Oh well, seems like a crusade of a very few.