An acknowledgment is a method of authenticating a signature on a document. The person acknowledging the record must personally appear before the notary.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. Acknowledgment of Instruments. The Pennsylvania individual acknowledgment certificate may be used when an individual is signing and acknowledging on his or her own behalf. There must be a Social Security Number, if available, in the birth mother's and birth father's sections of the Acknowledgment of. This Agreement may not be amended except in writing with the acknowledgment of the Parties. It is often described as the law that keeps citizens in the know about their government. Positive: • Restricts the disclosing party only.