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.A Washington notary acknowledgment form is used to officially authenticate a signature on a legal document. Download a notary acknowledgment form in PDF or Word format. Welcome to Washington State Courts. On this ____ day of ______, 20____, before me personally appeared ______ (name of individual signing), to me known to be the ______ (president, vice president,.