A Notary Public is also sometimes known as notary or public notary and it is usually a senior lawyer who is officially appointed by the Archbishop of Canterbury in England.
Notaries are mainly concerned with documents to be used overseas.
A notary public can issue a Notarial Certificate to certify for example, that the person(s) stated in the document have signed the document in the Notary's presence. A Notary Public can also confirm in the Notarial Certificate that he had compared a copy of a document with the original and have found the former to be true copies.
Notarial functions include:
Attesting the signature and execution of documents
Authenticating the execution of documents
Administration of oaths and declarations
Certify true copies of documents