What is the name of the notarial certificate for an oath or affirmation?

The notarial certificate for an oath or affirmation is typically called a "notarial oath" or "notarial affirmation." This certificate is used by a notary public to confirm that an individual has taken an oath or made an affirmation regarding the truthfulness of a statement or document. It includes details such as the date, the notary's signature, and the official seal.