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.This 5-step guide will teach you how to notarize a document that requires an acknowledgement (the most common notarial act). This article and video will show Notaries to fill out each part of a notarial certificate, and common mistakes to avoid. Washington Free Notary Acknowledgment Template. Use our Notary Acknowledgment Form to certify that you have signed a legal document in front of a notary public. This portion of the simple will-drafting instructions explains how to format the signature lines and affidavit of your simple will. For witnessing or attesting a signature: State of Washington. Any person who is otherwise competent but is physically unable to sign his or her name or make a mark may make an acknowledgment authorized under this chapter. Any person who is otherwise competent but is physically unable to sign his or her name or make a mark may make an acknowledgment authorized under this chapter.