Doing overseas business may seem advantageous; some good or services can be unavailable locally, so you may hit a sudden demand. But the main drawback in overseas sales is that, you are not protected by your own judicial system for an order done from another company. It will be hard to force someone to pay some $1,000, via laws.
Some countries have much higher risks than others. Here’s a list of countries you must add a point to your own fraud system. They all have abnormally higher instances of credit card fraud:
There are other Eastern European countries that suffer from the same problem.