Legalisation is the process of authenticating a signature, seal, or an overseas Apostille appearing on a document. Once legalised the documents can be accepted in an official capacity in a jurisdiction that is not party to the Hague Convention.
Notarisation an attestation by a Notary Public that the signature appearing on a document is true and genuine.
Certification – certifying that the signature appearing on a document is true and genuine.
Apostille – A Government Official in the country of origin has to declare the signature of the Notary Public as true and genuine.
Legalisation – The embassy of the country where the document is to be presented can now declare and accept the signature, seal or stamp appearing on the document as genuine.