The challenges can be somewhat tricky to ascertain when the executive tasked with the outsourcing project resides in another country.
Most countries simply do not have laws dealing specifically with outsourcing related issues...as such common labor laws are being used to safeguard the process. One of the mandatory considerations any business therefor has to consider is if the process of outsourcing will violate applicable labor or other laws.
Baker McKenzie has created an Ebook which is available for free download which addresses a variety of questions related to outsourcing. They currently allow for a free, no registration download at the link shown below.
They presumably created the book to drum up some business. Never the less, credit is due where credit is due. It is a great resource. It covers 19 jurisdictions (countries) and therefor has a broad based appeal.
If you like to learn a bit more about what the document entails please visit their designated page (Baker McKenzie) explaining the Ebook in a bit more detail