A more thorough explanation:

A notary's certificate is a document that confirms the authenticity of certain acts and documents. It is signed and sealed or stamped by a notary public, who is an official authorized to witness and certify legal documents.

For example, if you need to sign a contract with a business partner in another country, you may need to have your signature notarized by a local notary public. The notary will then provide you with a notary's certificate, which confirms that your signature is genuine and that you signed the contract in their presence.

Another example is when you need to apply for a passport or a visa. You may need to provide a notary's certificate to confirm your identity and the authenticity of your documents, such as your birth certificate or your marriage certificate.

Overall, a notary's certificate is an important legal document that helps to prevent fraud and ensure the validity of legal transactions.