An Apostille is an authentication of a public document issued pursuant to the 1961 Hague Convention abolishing the Requirement of Legalization for Foreign Public Documents. The Convention provides for the simplified certification of public (including notarized) documents to be used in countries that have joined the convention. Under the Hague Convention, signatory countries have agreed to recognize public documents issued by other signatory countries if those public documents are authenticated by the attachment of an internationally recognized form of authentication known as an Apostille. The Apostille ensures that public documents issued in one signatory country will be recognized as valid in another signatory country.