There are many types of companies and organizations that offer merchant services and it is up to business owners to properly research the type of company they want and choose one that adequately fits their needs.
Of all the merchant service providers, international companies are the riskiest. Their lack of physical presence within the country means that they are not regulated in the same manner or by the same rules as domestic companies. This means that if you have any problems with them, you may not be able to resolve it in a suitable manner. International merchant services should only be used if you have poor credit ratings or are being denied by domestic companies.