Only public documents are covered under the convention. The legislation of the nation in which the document was issued determines whether or not it is a public document. A wide range of documents are frequently subjected to the Convention by countries. Birth, marriage, and death certificates, extracts from business registrations and other registers, patents, notarial acts and notarial attestations of signatures, and school, university, and other academic degrees issued by public institutions are all eligible for an apostille. Documents signed by a diplomatic or loan signing agent are not covered by the Apostille Convention. Administrative documents related to business or customs operations are also immune from the Convention's reach.