A birth certificate apostille is an authentication required for using birth certificates in foreign countries. An apostille certifies or authenticates a document and is issued by mandatory authorities with an official stamp or signature attached to the document. It makes the birth certificate valid in the destination country by adding credibility. A birth certificate apostille has a certain validity period that depends on the issuing country. Common purposes for a birth certificate apostille include school admission, migration, higher education, and obtaining a resident visa.