I can really understand the feeling of one meet fraud in business,angry,desponding,with the lose of money and time etc.So disclosure of fraud is a good,others should be benefit from it.
But I advise that when you post a story of fraud,you can post more details.When,where,how,the result,the amount,and so on.
So others will know more about the fraud and the whole thing,we can find more characteristic of bilker,prevent them more carefully.

Replying to [AlexWang]: We also need to determine if it is real fraud or a deal that went sideways. Sometimes the one who is complaining the most is the cause of the problem. Best way to avoid a fraud is to not expect the impossable

Replying to [kivi]:Thanks for your reply.
How to estimate a real fraud is responsibility for all parts.
I think your words of "not expect the impossible"is a good way to avoid fraud.
Maybe we also can talk about some ways to avoid fraud.