Certificate Apostille is a procedure for approving Certificates for usage outside the country. Certificate Apostille in Oman is a formal verification of Certificates that confirms the legitimacy of a Certificate issued in one nation to be acknowledged and accepted in another nation that is a signatory to the Hague Convention. It is through a multi-step process. The issuing nation’s competent authority, such as the Ministry of Foreign Affairs or the approved government agency, must first certify the Certificate. The same authority or another designated organization affixes an apostille to the Certificate after authorization.