Not case sensitive.

Apostille:

An Apostille may neither be required nor necessary. The CeDiploma has legal standing, is non-repudiating, and can be validated through the Institution’s website to provide absolute confidence in the credential’s authenticity. Questions should be redirected to reg-diploma@uiowa.edu.

You may check institutional accreditation through the Council for Higher Education Accreditation (CHEA):
(CHEA is an independent, non-profit organization, and neither endorses, authorizes, sponsors, nor is affiliated with CeCredential Trust.) .