What is Apostille definition and How can we apostille a document

An apostille is a certification provided under the Hague Convention of 1961 for authenticating documents for use in foreign countries. The sole function is to certify the authenticity of the signature of the document.Put simply, an apostille is a certificate that is attached to another document so that it will be accepted when used overseas. There are designated authorities in every country to issue apostille certificates. Apostilles are commonly issued for various documents related to adoption cases, for commercial documents, for official documents related to vital statistics and for court records, land records, school documents and patent applications. The apostille is widely accepted by many countries that have signed up to the Hague Convention.  Currently, there are 98 Hague Convention countries and the list continues to grow on a regular basis.