Besides the ideal of having at least one reference from your own country that is a WFTO member (as discussed in the above FAQ), there are additional aspects to consider when finding a referee. Of the three referees you list, all of them must be aware and have confirmed to write a reference that will support your application. These referees need to agree that they will not only give a reference but that it will be a supportive one. This step should be taken before adding their name to the application. No costs should be associated with the reference process.