What action can a notary NOT perform under the law?

The action that a notary cannot perform under the law in this context is conducting a marriage ceremony. Notaries are primarily responsible for witnessing signatures, verifying identities, and taking oaths related to various legal documents. While notaries have extensive powers to act in various capacities related to notarization, officiating marriages typically requires a separate license or authority, depending on the jurisdiction. In some areas, notaries may be granted the power to conduct marriage ceremonies, but this is not universally true and requires special authorization that is not inherent to the role of a notary.

Verifying identities, notarizing documents for family members, and taking oaths are all within the standard powers and duties of a notary public. Therefore, these actions are permissible under the law, which distinguishes them from the specific action of conducting marriage ceremonies.