An acknowledgment is a notarial act in which the signer declares to the notary that they willingly signed the document.
When a jurat is required, the notary must administer an oath or affirmation to the signer, who swears to the truthfulness of the document.
A New York State Notary Public is required to use a rubber stamp with their name and the words "Notary Public, State of New York".
A jurat involves the signer taking an oath or affirmation before the notary, swearing to the truthfulness of the document's content.
A notary should refuse to notarize the document if they suspect the signer is being coerced or is not acting of their own free will to ensure the validity of the notarization.