Scammer posing as a freelance developer

 
what do we do if a scammer is posing as a developer and he is only after the percentage from arbitrations 
 
scpmtf:
what do we do if a scammer is posing as a developer and he is only after the percentage from arbitrations 

he does not get the % from arbitrations if he is found to be in fault . The commission of the project is kept by mql5.com itself either way.