An Apostille is a certificate that authenticates the origin of a public document. It is issued by a country that is a party to the Apostille Convention to be used in another country which is also a party to the Convention.
Authentication is required for all Philippine documents to be used abroad.
After authentication by DFA-OCA, there is no more need for an authentication by Embassies or Consulates except for non-Apostille countries and those that objected to the Philippine accession.