What is the Hague Apostille?
An apostille is an attestation issued by the competent authority to confirm the authenticity of a signature or a stamp on a public document but, it does not mean that the content of the document is correct, it is only a signature of acknowledgment so to speak.
Apostilles are determined by the countries that adhered to the "Hague Convention" of 1961, abolishing the requirement of consular legalization/attestation so all public documents issued in these countries and destined abroad must have the Apostille, documents such as:
civil registration certificates
certificates of any kind that come from official bodies
notarial deeds and notarial signature certifications
diplomas issued by public institutions