The Notary alone is competent to personally ascertain the will of the parties or where such parties do not appear personally, of the identity of their agent and to inquire, after reading over and explaining the act to them, whether it is in accordance with their will. Such identity shall be ascertained by the production of the official identity card, passport or other similar official document, or where such document cannot be produced, on testimony of two attestors personally known to the Notary, who may also be witnesses appearing on the deed.