Here at the NOCA Credentialing Leadership Forum, Robert Pedigo from Castle Worldwide and Paul Grace from the National Board for Certification in Occupational Therapy make the following points about the challenges of international credentialing:
America has a testing culture that differs from other parts of the world. Europe, for example, has an established guild system and in general Europeans are not very trusting of a test's ability to verify knowledge and skills.
Data privacy laws are very different elsewhere than in U.S. so operationalizing an international certifying system is challenging.
Differing culture norms create additional challenges. In some parts of the world it is not unethical to share test questions, for example.
Certification marks are challenging to control internationally.
It's difficult to establish foreign equivalency of educational experiences.
Their key advice was to do your homework. Talk with others who have navigated international credentialing with the same geographical region as you are investigating. Also, be sure to get legal counsel experienced in international affairs.
Interestingly, there was little to no discussion of the opportunities in international credentialing. Assumed, perhaps?