Synonyms of attesting

attesting

verb

present participle of attest

1

as in certifying

to declare (something) to be true or genuine

the appraiser attests that the lamp is indeed an original Tiffany

Synonyms & Similar Words

• certifying
• affirming
• guaranteeing
• witnessing
• authenticating
• testifying (to)
• asserting
• vouching (for)
• avouching
• warranting
• professing
• averring
• vowing
• avowing

2

as in testifying

to make a solemn declaration under oath for the purpose of establishing a fact

an eyewitness who will attest to my innocence

Synonyms & Similar Words

• testifying
• verifying
• witnessing
• swearing
• bearing witness
• deposing
• vouching
• promising
• vowing

3

as in confirming

to give evidence or testimony to the truth or factualness of

I'll attest that she was at the party

Synonyms & Similar Words

• confirming
• verifying
• arguing
• supporting
• corroborating
• certifying
• proving
• validating
• demonstrating
• authenticating
• substantiating
• vindicating
• witnessing
• affirming
• reinforcing
• establishing
• bearing out
• documenting
• asserting
• declaring
• guaranteeing
• testifying (to)
• professing
• averring
• warranting
• backing (up)
• avowing
• vouching (for)
• avouching

Antonyms & Near Antonyms

• refuting
• disproving
• rebutting
• contradicting
• denying
• disclaiming
• disavowing
• questioning
• contesting
• disputing
• challenging
• gainsaying

Example Sentences

Recent Examples of attesting

The notable exception is the always effective Lena Olin, whose brief turn as a concentration camp survivor attesting to Hermine’s true sadistic nature packs a quiet charge. — Michael Rechtshaffen, HollywoodReporter, 11 Sep. 2026

Some lenders use standard factors by industry; others will accept a letter from a CPA attesting to the business’s actual expense ratio, which can meaningfully improve the income calculation for a lean operation. — Karen Koehler, Miami Herald, 31 Aug. 2026

The board's disagreement over the signature review came down, in part, to a partisan split over accepting late-arriving affidavits from voters attesting that the signatures rejected by elections staff were valid. — Clara Hendrickson, Freep.com, 25 Aug. 2026

As a bonus, the tote has stellar reviews attesting to its functionality and design. — Shea Simmons, PEOPLE, 6 Aug. 2026

Ahead of the meeting, the FDA received more than 1,900 public comments, including from doctors and patients attesting to the benefits of peptides. — Matthew Perrone, Fortune, 23 July 2026

Cadman pleaded guilty to federal charges of conspiracy against rights and attesting to a false tax return and is awaiting sentencing. — Brittny Mejia, Los Angeles Times, 20 July 2026

The secretary’s role also includes keeping the state seal and attesting to the governor’s signature on state documents. — Mary Ella Hastings updated July 17, Fort Worth Star-Telegram, 17 July 2026

Every contribution must come with paperwork attesting to its source. — Mark Pazniokas, Hartford Courant, 13 June 2026