On the ____ day of ____ in the year ____ before me, the undersigned, personally appeared. , personally known to me or proved to me on the basis of satisfactory.An acknowledgment is one of the most common types of notarial acts, but it often confuses Notaries. Here are 5 steps to performing an acknowledgment. On the _______day of ______ in the year_____, before me, the undersigned notary public, personally appeared. This 5-step guide will teach you how to notarize a document that requires an acknowledgement (the most common notarial act). How do you fill out an acknowledgment letter?