An apostille is a certification of the authenticity of documents that will be used in foreign countries. The only function of an apostille is to certify the authenticity of one or more signatures on a document. The certificate, approximately 15 cm2 in size, is permanently affixed to the document whose authenticity it certifies.

After attaching, both the apostille and the document are embossed with the official state seal. Apostille can be placed on commercial documents, documents related to adoption, official documents related to civil registration, land registers, court records, as well as patent applications and school documents. https://www.confiduss.com/en/info/blog/article/document-apostille-legalization/