A simplified certification of public (including notarized) documents used in countries that participate in a Hague Convention. This simplified form contains numbered fields (which allow the data to be understood by all participating countries regardless of the official language of the issuing country). The completed apostille form certifies the authenticity of the document's signature, the capacity in which the person signing the document has acted, and identifies the seal/stamp which the document bears. Documents needed for intercountry adoptions require the attachment of an apostille (rather than authentication forms) if the foreign country participates in the convention.

Source: Children Welfare Information Gateway