Please enter CeDiDnot case sensitive: 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 registrar@oneonta.edu. Leave this field blank Related Pages Security features of a CeDiploma or CeCertificate CeDiploma and CeCertificate Credential OverviewCommonly asked questions about the CeDiploma or CeCertificate