Agree, you will have do make proper due diligence on each and every client to ensure that they are not into some "funny business"! You may want to know that you will be held responsible for all activity of the company.
All party's should be very careful here! I don't want to be the bad man (lol) but pay carefully attention to what you are doing and maybe consult a lawyer.
I mean that you need to comply to several international laws and regulation! You also need to take into consideration the rules about preventing financing terrorism and lot's of other stuff.