i only ask your trying to cater to international customers who will have very little recourse if scammed as most cc companies wont refund them due to the nature of this and most likely if they do there gonna tell some lie which could have the fbi at your doorstep 
I'm sorry I should have clarified. I stated that I will cater only to International customers because I am currently unaware of regulatory issues that I may face if I deal with customers within US. Due to lack of guidance and information, I am playing a better safe than sorry approach to this. I also don't see why customers within the US needs my service.