They are different in the following ways:
1. The nature of the notarization of a judicial certification as an important legal method for providing legal services, supervision and safeguard in society.
2. Notarization is a certification done by the judiciary of a state while witnessing certification provided by citizens or institutions.
3. Notarization has the effect of certification, forcible execution and is legally binding outside the state, while a witness has no such legal effect.
4. Notarization can cover various judicial acts, facts and documents and is not restricted by trade, parties, act or content, and the certification is proven truthful and requiring no further proof while the witness covers fewer matters as proof being truthful only in so far what the certifier has seen.
5. A notary can conduct the certification according to procedures, conditions and modes prescribed law.
6. Notarization has the nature of authority, fairness, general purpose, comprehensiveness and standardization, while a witness has none of these.
7. Notarization can substitute for a witness while a witness cannot substitute for notarization. If the law states that notarization is needed then it must be conducted, while a certificate of witness from a lawyer cannot be a substitute for notarization.