Writing · September 10, 2026
What an Evidence Attestation is
A sentence in a brief is either supported by a source or it is not. An Evidence Attestation records a named reviewer's completed review, before the brief goes out, of its cited evidence and its coverage note. It is the difference between a brief that claims to be traceable and one that has been traced.
What it confirms
It confirms two things, and nothing else. First, every factual sentence in the brief is supported by the evidence cited beside it. Second, the coverage note (the brief's statement of what was and was not read) matches what Byline actually collected that morning. It does not say the recommendation is right: that judgment stays with the reader.
Who gives it, and who cannot
A Byline reviewer gives it, and the brief records who attested and when. Your organization's own approver makes a separate decision, called Decision Approval, on any item that recommends preparing or responding. Neither person can do the other's job, and the brief shows who did what. No one can approve their own work: whoever wrote or last edited an item cannot approve it. The database itself refuses the attempt, not just the application.
What happens at the deadline
A missing attestation is never hidden. Each program sets what happens at its attestation deadline: the brief is held until a reviewer attests, which is the default, or it is released and marked. A brief delivered without an attestation says so clearly: its evidence has not been checked by a Byline reviewer. Since September 6, 2026, an attestation is recorded only when a reviewer gives it.
Why it is not a signature on a summary
Before anyone attests, the system has already removed what does not match. In the “what changed” text, any AI-written sentence that does not match the source claims is removed before saving. So the reviewer attests to factual sentences checked against their evidence, not to the general impression of a page. The Trust page explains how this is enforced.
What it is not
It is not a certification, an audit opinion or a guarantee that the sources are right. It is a reviewer's statement that the brief says what its evidence says. That is a smaller claim than most intelligence products make, and one you can check. The About page says how Byline runs a desk.