Every few months I get requests from some 3rd world country to buy my products, They want me to use their shipper, have me pay for shipping and will pay me by credit card. Of course they will dispute all charges and split money I would have paid to the shipping company.
Unless I am dealing with a previous customer, I only ship product after I receive funds in my account via wire transfer. Once the funds hit my account there is nothing they can do to reverse it.
If it sounds too good to be true, it usually is!
Gary