Acknowledgment of a Mark. 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. If signer is acknowledging as attorney in fact, check third box and write in name of absent principal signer. Download a template here. We voluntarily sign this acknowledgment to establish the child's paternity. We understand that this acknowledgment will be filed with the child's. Completing the Document. Person filling out document Like any profession, the cost of a notary's time can be expensive. Its handling is easy and practical ink dries fast.