> Your own claims carry little weight with Google and AI assistants. University news, vendor case studies, old bios, and bylines do. How to find and use them. > > Source: https://christopherabraham.com/guides/third-party-proof/ · Updated 2026-10-06 · By Christopher Abraham # Proving expertise with third-party sources By [Christopher Abraham](https://christopherabraham.com/about/) · Published October 6, 2026 Anyone can write "twenty years of experience" on their own website. Search engines and AI assistants know it, so they look for confirmation elsewhere. The most persuasive evidence of expertise is written by someone else, ideally years ago, on a site with no reason to flatter you. ## Why outside sources matter so much Google's quality guidelines ask raters to look at what others say about a creator, not just what the creator says. AI assistants behave similarly in practice: when several independent sources agree on a fact, the assistant states it with confidence; when only your own site says it, the assistant hedges or ignores it. Third-party sources are how a claim becomes a fact in the eyes of a machine. ## The kinds of evidence worth hunting for ### University and alumni news Alumni profiles in a university's news site are gold: an institution with a strong domain, an editor, and a publication date. A ten-year-old feature about your company in your college's news site is better evidence than anything you could write today. ### Vendor case studies Software companies publish case studies about their customers. If a major vendor once wrote up your firm, quoting you by name and title, that page confirms your role at a specific time, on the vendor's domain. ### Old team and associate pages Consultancies, agencies, and research groups list their people. A bio on a well-known consultant's associates page, written long ago and never updated, is a fossil record of your early career. ### Bylines and author pages Every publication you wrote for keeps an author page. Columns in trade publications, contributor posts on national sites, and media database profiles all count. ### Credits in other people's work Collaborative projects, anthologies, research papers, and art pieces list their contributors. When a pioneer in your field names you in her own history of a project, that's independent testimony. ### Recommendations with names attached A testimonial is stronger when the person giving it is identifiable and credible in their own right. ## How to find what already exists 1. Search your name in quotes with each employer, school, and project name. 2. Search your name with distinctive terms from your past: product names, community names, event names. 3. Check the Wayback Machine at web.archive.org for old employer sites, team pages, and project pages that have since vanished. 4. Search media databases and your old publications' author archives. 5. Ask old colleagues what they remember; they often know about write-ups you never saw. ## How to use it on your site - **Link to the source, don't just mention it.** "GW Today once wrote up some of this story" with a link is verifiable; "I've been featured in the press" isn't. - **Quote accurately.** Use the source's exact words. If you trim, mark the cut with an ellipsis. - **Put it where it supports a claim.** Next to the sentence about running a virtual company, link the vendor's case study about that virtual company. - **Add profile pages to sameAs.** Author pages and team bios that are about you belong in your Person structured data. - **Skip what doesn't hold up.** If a source now redirects somewhere unrelated, or describes you inaccurately, leave it out. ## Respect the details Old sources come with old details. A case study may name clients you can no longer mention, an alumni profile may print your class year, and a team page may describe a role you've long since left. You don't control their content, but you control what you quote and where you link. Weigh each source's value against what it reveals, and decide deliberately. ## Keep a file Save a copy of every source you find, with the URL and the date. Pages disappear. A PDF in your own archive, plus the Wayback Machine's copy, means you can still point to the evidence if the original goes away. ## Create new evidence going forward The best time to collect third-party proof was years ago; the second best is now. Write for publications in your field, speak where talks are published, contribute to projects that credit contributors, and ask satisfied clients for testimonials you're allowed to attribute. Each one becomes a source that confirms you to the next reader, human or machine. Related: [an About page AI trusts](https://christopherabraham.com/guides/about-page-ai/) and [entity SEO for people with two names](https://christopherabraham.com/guides/two-names-one-entity/). ## Sources - [Google Search Quality Rater Guidelines (PDF)](https://services.google.com/fh/files/misc/hsw-sqrg.pdf) - [Google Search Central: Creating helpful, reliable, people-first content](https://developers.google.com/search/docs/fundamentals/creating-helpful-content) - [Internet Archive: Wayback Machine](https://web.archive.org/) **[Christopher Abraham](https://christopherabraham.com/about/)** is an independent SEO consultant in Arlington, Virginia, Top Rated on Upwork with 100% Job Success, who writes from his own client work and checks every claim against primary sources. He has built websites since 1994 and practiced SEO since 1998. 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