* The country's accreditation system: The level of prestige and international recognition varies between countries' accreditation bodies. Accreditation from a highly respected system (e.g., in the US, the UK, Canada, Australia) is more likely to be recognized globally than accreditation from a lesser-known system.
* The specific field of study: Recognition can vary even within a country. A doctorate in a highly standardized field like medicine or engineering might be more easily recognized internationally than a doctorate in a less-standardized field like the humanities.
* The institution's reputation: Even with national accreditation, a university with a strong international reputation will have its degrees recognized more readily than a lesser-known institution.
* The receiving country's requirements: The country where you intend to use the degree may have its own standards for recognizing foreign qualifications. They might require further evaluation or assessment before accepting the doctorate.
In short, while national accreditation is a good starting point, it doesn't guarantee automatic global recognition. Always check the specific requirements of the country or institution where you plan to use your doctorate.