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English definition of “attest”

attest

verb     /əˈtest/ formal
[T] LAW to sign a document to show that you were present when it was signed by someone else: The will must be attested by two witnesses. The statement was signed and attested by a high court judge.
[I] LAW to say officially that something is true or accurate: attest to doing sth Couples must attest to being in a committed relationship.attest to sth The commission demands that Chief Financial Officers personally attest to the accuracy of their financial statements.
[I] to show that something is true: attest to sth The decline in sales attests to the fact that the product is out of date.
attestation noun [C or U]
(Definition of attest verb from the Cambridge Business English Dictionary © Cambridge University Press)
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