This paper examines quality assurance in Nigerian University education and credentialing. The research contends that university education in Nigeria which hitherto enjoyed tremendous global respectability and acceptability is fast loosing its high esteem in the face of labour market and members of community because the currently certified Nigerian graduates lack acceptable level of competence in their areas of specialization. If proper quality assurance mechanisms are set in motion, then the certificates, the diplomas and the degrees awarded as credentials will be worthwhile. The paper examined concern for quality in Nigerian University education, determinants of quality in university education, external quality assurance mechanism, internal quality assurance mechanism and strategies for sustainable Institutional quality. Recommendations include the repositioning and strengthening of the National Universities Commission to face the challenges of quality assurance in Nigerian Universities, promotion of Institutional culture of quality assurance and track tracing of the graduates by their universities for feed-back from employers.