When a document requiring notarization contains acknowledgment wording the signer is not swearing or affirming to the truthfulness of a document, the signer is simply acknowledging that they signed the document. Acknowledgments are used to verify the identity of the signer and confirm that they indeed signed a document requiring notarization. For example in California when an acknowledgment is presented on a document requiring notarization the signer is not required to sign the document in the presence of the Notary Public ( document may be pre signed) however the signer is required to personally appear in front of the Notary Public to verbally confirm their signature in person.
When a document requiring notarization contains Jurat wording the signer is swearing to the content of the document. The notary must administer an oath or affirmation to the signer in order to complete the Jurat. A Jurat also requires that the signer signs in the presence of the notary. It is possible to glean this information from the Jurat certificate its self. The wording states “Subscribed and sworn to before me…” – subscribed meaning “signed” and sworn meaning that an oral oath or affirmation was given. “Before me” means that both were done in the presence of the notary public.