What the signer does
For an acknowledgment, the signer tells the notary that they signed the document and did so willingly. The document may have been signed earlier, as long as the signer appears and acknowledges the signature.
For a jurat, the signer must sign in the notary's presence after taking an oath or affirmation that the statements are true.
Both acts require the signer to appear before the notary in person, or through a permitted remote process. The difference lies in what the signer says and when the signing happens, not in whether identity is checked.
What the notary does
In both acts, the notary verifies identity and sees that the signer appears willing. For a jurat, the notary also administers the oath or affirmation out loud. That spoken step is not optional.
The notary does not read the document for accuracy. The notary only handles the identity and the ceremony.
A proper oath is short. The notary asks whether the signer swears or affirms that the statements in the document are true, and waits for a clear spoken answer. A nod alone is a weak record, so many notaries log the spoken answer.
Typical documents
Acknowledgments commonly appear on deeds, powers of attorney and contracts. Jurats commonly appear on affidavits, sworn statements and some forms filed with agencies. These are common patterns, not rules about what any document must use.
The document's receiver tells you which one is needed. The notary cannot decide this for you.
Some forms include both an oath and an acknowledgment. In that case the notary follows the certificate that is attached, and does not blend the two. If the form is unclear, the signer asks the receiving party, not the notary, which wording is needed.
Reading the certificate
An acknowledgment certificate usually includes words like acknowledged before me. A jurat certificate includes words like subscribed and sworn to before me. These cues help a signer check which act is printed.
If the document has no certificate, the signer must ask the receiving party which one to attach.
Be careful with preprinted certificates that mention both words. If the signer needs a different act than the one printed, the notary cannot change the wording on the spot, and a new certificate may have to be attached.
Common mix-ups
Signers sometimes bring a signed affidavit that needed to be signed in front of the notary. If the jurat requires signing in presence, the signer must sign again on a clean copy. Another mix-up is a missing oath. If no oath is given, a jurat is not complete.
When in doubt, call the receiving office before the appointment.
A quick rule of thumb
If the paper asks you to swear that facts are true, expect a jurat and plan to sign at the table. If the paper asks you to confirm that you signed it, expect an acknowledgment and bring the signed or unsigned document with ID.
Common questions
Can I sign before I meet the notary?
For an acknowledgment, usually yes. For a jurat, no. Wait to sign until the notary is watching.
Is an oath always religious?
No. A signer may choose an affirmation, which has the same legal effect without religious wording.
This guide is general information, not legal advice. Fees and procedures change; check with the office involved or an attorney for your situation.