To confess. Acknowledgement of one another's faults is the highest duty imposed by our love of truth.

To own or admit the knowledge of; to recognize as a fact or truth; to declare one's belief in; as, to acknowledge the being of a God.

To own or recognize in a particular character or relationship; to admit the claims or authority of; to give recognition to.

To own as genuine; to assent to, as a legal instrument, to give it validity; to avow or admit in legal form; as, to acknowledge a deed.

Certify the authenticity of a signature on a brokerage or bank document, such as for an account transfer.

recognition of something done by another There was acknowledgement by the research team that they had been helped with equipment by a cigarette manufacturer. The author dedicated his book to his parents as an acknowledgement of the faith they had always had in him and his work. acknowledge (v)

declare to be true or admit the existence or reality or truth of; "He admitted his errors"; "She acknowledged that she might have forgotten"

express recognition of the presence or existence of, or acquaintance with; "He never acknowledges his colleagues when they run into him in the hallway"; "She acknowledged his complement with a smile"; "it is important to acknowledge the work of others in one's own writing"

accept (someone) to be what is claimed or accept his power and authority; "The Crown Prince was acknowledged as the true heir to the throne"; "We do not recognize your gods"

To express appreciation or recognition to a person carrying out a task.

certifying authenticity

To recognize; to admit the genuineness or validity of.

To admit or recognize one's own acts.

In layman's terms, this means to generally to admit something, whether bad, good or indifferent. Legally, this means to verify statement, a deed, lease or power of attorney through a notary public or other officer, to certify it as legal.

A declaration by someone that something is true.