Of course, the idea is to receive guidance and corrections, but not to have your work done as such. Now if it is for transcribing the thesis or paper, I see nothing wrong. What is illegal is that they pay for the thesis and forget about it until it is ready, that should not be.That is absolutely they main point am driving at but in the case whereby the person allows someone to do all the academic work without inputing anything and it's not guided,then it can be considered illegal.