Oman Embassy Attestation: The HRD Attestation & MEA Attestation or MEA Apostille as required by the visiting country on the same document, followed by the Oman Embassy Attestation, is the last step to be completed on your original documents (s). Any educational credential, personal document, or business document from your native country can be attested by an embassy. The nation from whom the document was issued must do primary document attestation, authentication, or embassy attestation.