Certificate attestation is the process of certifying that a digital certificate is valid, authentic and affords the holder of the certificate to access a specific online resource. There are many ways to attesting a certificate such as using an online portal service or requesting an email with a link that can be clicked on and this will automatically generate an attestation form which will require some information from you. Certificate attestation is a procedure by which the authenticity of any document, especially a degree certificate, is authenticated.