Which of the following is a valid method of proving identity during notarization?

A valid method of proving identity during notarization is the use of a valid driver's license. In California, a driver's license is an accepted form of government-issued identification that includes a photograph, signature, and other identifying information. This allows notaries to verify the identity of the signer effectively.

While physical identification is indeed necessary for proving identity, the phrase "only physical identification" may imply that there are no alternatives, which is not true. Credible witnesses can also play a role in affirming a signer’s identity under specific circumstances. Therefore, relying solely on physical identification is too limiting.

Using credible witnesses is another recognized method of identification, providing an option when a person does not have a specific form of ID. Credible witnesses can vouch for a signer’s identity based on their personal knowledge.

The integration of these ideas through the collective options highlights that valid identification is crucial in notarization, and both specific forms of property, like a driver's license, and the presence of credible witnesses can serve this purpose. However, the focus on a driver's license as a direct and conventional form of ID makes it a particularly strong answer.