A Notary Public is a public official who is authorized to witness and certify the signing of legal documents. The purpose of Notary Public certification is to provide an impartial witness to the signing of important documents and to deter fraud. Here are a few reasons why Notary Public certification is preferred:

1. Legal validity: Many legal documents require a Notary Public certification for them to be legally valid. These may include contracts, deeds, wills, and powers of attorney. Notary Public certification provides an added layer of legal protection and helps to ensure that the document is executed properly.
   
2. Fraud prevention: Notary Public certification helps to prevent fraud by requiring that the person signing the document is who they say they are. The Notary Public checks the signer’s identification and witnesses the signing of the document. This helps to ensure that the person signing the document is doing so willingly and is not being coerced.
   
3. International recognition: Notary Public certification is recognized internationally, making it easier to conduct business across borders. Many countries require Notary Public certification for certain types of documents, such as those related to real estate transactions.
   
4. Professionalism: Notary Public certification adds a level of professionalism to the signing of important documents. It shows that the signer took the process seriously and that the document has been properly executed.

Overall, Notary Public certification is preferred because it provides legal validity, fraud prevention, international recognition, and professionalism to the signing of important documents.