Form for Ordinary Certificate of Acknowledgment. (Personalized Seal).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. To allow individuals to acknowledge they received a notice of an administrative disqualification hearing. Texas Notary Acknowledgment Form. An Acknowledgment of Paternity (AOP) is a legal document that allows parents who aren't married to establish legal paternity. This 5-step guide will teach you how to notarize a document that requires an acknowledgement (the most common notarial act). Donation acknowledgment letters are more than just a donor tax receipt. There are certain items to include for tax purposes.