Writing someone else's master's thesis: Unethical and illegal? It is really difficult for me to decide on this situation: when someone calls me and asks for work-for-hire for his/her thesis. I don't know what to do. I want to help and earn money but I think this way of earning money is unethical. 
I think that receiving the title of thesis and giving back prepared manuscript is the intention that some people have, when asking for their thesis to be written. 
There are plenty of websites offering such services! 

The question is that: Is it legal and or ethical to write someone else's master's thesis as work-for-hire?
Think about it this way: Eventually one of those people for whom you write the thesis will be working for your stockbroker and influencing your investments, or working for your doctor or a hospital and influencing your medical care, or working for your government and influencing permits and regulations, or ...

Leaving aside the potential immediate consequences for your "principal" and yourself, you would be making the world a worse place for everyone.

Does that answer your question?