Final answer:
A notary must sign documents with the signature that matches the one on their notary commission to ensure the document's legality and prevent fraud.
Step-by-step explanation:
The question asks whether the notary's signature must be exactly as it appears on the notary commission and the answer is true. When a notary signs a document, they must do so using the name that appears on their commission. A notary's official signature is used to affirm the identity of the signatory on a document, swear in witnesses, and certify copies of documents. It is essential that the signature on the document matches the name under which the notary is commissioned to ensure the document's legality and to prevent the implication of fraud or impersonation.