certify usually applies to a written statement, especially one carrying a signature or seal.
certified that the candidate had met all requirements
attest applies to oral or written testimony usually from experts or witnesses.
attested to the authenticity of the document
witness applies to the subscribing of one's own name to a document as evidence of its genuineness.
witnessed the signing of the will
vouch applies to one who testifies as a competent authority or a reliable person.
willing to vouch for her integrity
Examples of attest in a Sentence
I can attest that what he has said is true.
The certificate attests the authenticity of the painting.
Recent Examples on the WebStill, many generations of composers have attested to the disinhibiting effect of life on the West Coast.—Alex Ross, The New Yorker, 4 Dec. 2023 Sometimes, as those who have been in his shoes can attest, there are no simple answers.—Rory Smith, New York Times, 1 Dec. 2023 Palmer claimed the abuse occurred over a two-year period, and that her mother and sister could attest to witnessing it.—Benjamin Vanhoose, Peoplemag, 1 Dec. 2023 Sharon may not know that the Macy’s Thanksgiving Parade will happen in the coldest weather and this year’s event can attest to the cold weather.—Walter Loeb, Forbes, 29 Nov. 2023 The leggings’ smooth outer shell is made of a water-resistant material that keeps you dry in light rain and snow, reviewers attest.—Olivia Young, Travel + Leisure, 26 Nov. 2023 As guidance from the U.S. Centers for Disease Control and Prevention attests, many such symptoms may be caused by viral infections.—Tammy Murga, San Diego Union-Tribune, 26 Nov. 2023 Designed to absorb negative energy, these dolls are a fun and therapeutic way to vent, as attested by satisfied customers who find joy and relief in using them.—Kathy Barr, Rolling Stone, 15 Nov. 2023 In 1876, as the story goes and an historical marker in Westport, Mass., attests, the farmers Aiden and Elihu Macomber brought turnip seeds back from the Philadelphia Exposition and planted them.—Florence Fabricant, New York Times, 13 Nov. 2023 See More
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'attest.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Middle French attester, from Latin attestari, from ad- + testis witness — more at testament