Which document is necessary to certify the authenticity of a notary public's act in Guam?

The Certificate of Authority is essential for certifying the authenticity of a notary public's act in Guam because it serves as an official document issued to the notary by the proper jurisdiction. This certificate verifies that the notary is authorized to perform notarial acts and confirms their signature on documents. It essentially validates the notary's commission, ensuring that their actions and executions of notarial duties comply with legal standards and procedures in the region. Therefore, this certificate acts as a safeguard for the integrity of the notarial process, providing reassurance to the public that the acts performed by the notary are legitimate.

In contrast, the other documents listed have distinct purposes that do not pertain directly to the verification of a notary's authority. For instance, a Deed of Trust relates to securing loans with real property, while a Power of Attorney grants one individual the authority to act on behalf of another in legal or financial matters. An Affidavit of Truth is a sworn statement of fact but does not pertain to the validation of a notary's commission or authority.