1.General: Statement declaring something to be factual or true (or confirming something to be genuine) and certified by a competent authority. Also called verification.
2.Commerce: Written (or electronic) communication to the buyer that the seller has accepted the buyer's purchase order. This acknowledgement creates a binding contract on both parties.
3.Computing: Message (such as one used in 'handshaking' process between two modems) that indicates the status of communications received. Commonly written as ACK.
4.Law: (1) Formal declaration made under oath, or in the presence of a notary public or other competent authority. (2) Avowal of debt after which the right of action to recover debt accrues to the debtor (and not before).
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