1. Contact the country embassy where the university is located. Ask them relevant questions ？ at times the embassy may request for an official letter for that purpose and a little amount of cash. please do it, It worth it.
2. Consult ministry of education in abuja . At times school may be accredited in her country but unfit for nigeria education standard. Mary abacha Uni. in niger is a typical example. This might also cost you, do it, it is better
3. Ensure the institution program is accredited by relevant authority where the school is located. Make the use of website to check on agency responsible for validating schools programs. E.g in Germany FIBAA is the only responsible agent to validate business course.
Lastly, make sure , your document are valid （i.e）WAEC ,passport and other traveling document are intact and free of fraud. This might be an obstacle for you to proceed into NYSC after you complete your degree if there is a little suspect of fraud.