Choose the country your document is from to check how you need to certify your document.
There are two ways you can get your documents certified:
Apostille or legalisation means that the authorities authenticate the original documents in the country where they are issued. It confirms the authenticity of the signature and the official stamp and that the person who signed the document is a public servant.
Whether you need to get an apostille stamp on your document, or you need to get your document legalised, depends on which country your document is from. You will get an answer to what you need to do with your document by choosing which country the document is issued in.