Русско-англо-русский юридический словарь

The acknowledgment or proof, if taken in the manner prescribed by the laws of such foreign country, must be accompanied by a certificate to the effect that it conforms with such laws. (NY Code)

An acknowledgment of a debt is in its very nature an express admission (just as a payment on account is an implied admission) of the existence of a debt. (parliament.uk)

The notarial certificate evidencing the taking of an acknowledgment is commonly known as a “certificate of acknowledgment��� or sometimes simply as an “acknowledgment.” (22 CFR § 92.32)

Acknowledgment: a notarial act whereby the signer of a document admits to an officer of the state, such as a notary public, that he signed the document; that he understands the contents of the document; and that he is aware of the consequences of executing the document by signing it. (Notary Terms and Definitions, American Society of Notaries)