Verify an AI citation before the claim reaches sales

The check applies to any competitive fact that arrived with a citation: a competitor's price, a feature they announced, a customer they signed. Claude attaches a citation to every web-search answer, and Anthropic's web search help page says this is "so you can easily verify sources yourself." The same page tells you to cross-reference cited sources for critical decisions. No setting enforces that, so the check is yours to run.

The three citation-verification guides reviewed for this lesson focus on academic references with a DOI and journal name. Sourcely's citation-verification page lists its audience as students, researchers, editors and lawyers, not competitive intelligence or business research. A competitive citation is usually a plain URL to a pricing page, a press release or a review site, and the check below is built for that.

Run the three-part check on every claim you keep

Work through the steps in order and stop at the first one that fails. Each step has one pass condition.

1. Open the URL and read the page itself

   Click through to the cited page. It passes when the page is about the company and product the claim names, at the scope the claim covers: the same plan, region and period. A link to the vendor's blog index, or to a comparison page written by a third vendor, fails here even though it opens.

2. Find the sentence that states the fact

   Search the page for the number, feature name or date in the claim. It passes when a sentence on the page says the same thing at the same scope. "Starts at $40 per user" does not support "costs $40 per user," and a feature listed as beta does not support "generally available." Both examples are invented. A claim with no such sentence fails, however plausible it reads.

3. Check the page date against the claim's shelf life

   Find the page's published or updated date, or the date of the release or review. Decide how old the fact may be for the use you have in mind. A price needs a freshness rule appropriate to its market and should be rechecked before use; a founding year does not age. A page with no date passes only when the fact is one that does not change.

Write the result next to the claim: the URL, the supporting sentence, the page date and the date you checked. A colleague can then trust the claim without repeating the work, and you can see when it is due for a re-check. The claim-ledger lesson gives the row format for many claims.

Ask for the sentence before you open the page

The most common failure is a citation that opens fine and does not contain the claim. The model read a page about the topic, summarised it, and attached the page. Whatever the summary adds beyond the page is the model's inference, delivered with the same citation as the facts.

Asking for the exact supporting sentence up front turns step two into a text search. The wording below asks for a verbatim quote and gives the model a way to say no.

For the claim "[paste the claim]", quote verbatim the sentence from
[paste the cited URL] that supports it. If no sentence on that page
states it, reply "not stated on this page" and do not paraphrase.

Open the URL and search for the quoted sentence. If it is on the page, step two is done. If it is absent, the model produced the quote as well, and the claim fails.

Quarantine the claims that fail

Keep a failed claim, marked unsupported, with the step it failed and what a passing source would need to say. Do not rely on memory to enforce a rejection: a written hold list is the auditable record. A later search can surface the same claim with a different citation; the hold list shows that it still needs evidence.

A held claim is often true and merely unsourced. Keeping it visible, with the gap named, sends someone to find the pricing page; when a source turns up, the claim moves to the ledger with its evidence attached. When two sources disagree, the conflicting-research lesson covers which one wins.

Nothing on the hold list goes into a battlecard. A battlecard line may be repeated on a call, so unsupported wording can reach a prospect directly.

Cross-check the few claims that carry weight

Most claims need the three-part check and nothing more. For a claim that could change a price, a positioning line or a live deal, ask the same question in an Incognito chat or a second tool and compare the answer and source. A second run is only a consistency check: agreement does not turn model output into evidence. Stronger evidence is the opened primary source or a genuinely independent source. Different numbers are a reason to investigate the conflict before the claim reaches sales.

Apply the same check to a Research report

Claude's Research mode runs many searches and returns a report with citations. It suits a batch of claims across several competitors, and each claim in the report still needs steps one to three. Anthropic's Research help page, read on September 14, 2026, calls the citations easy to check and offers no accuracy guarantee. The same page states that Research is available only on paid plans (Pro, Max, Team and Enterprise) and needs web search turned on.

Web search itself is available on Free, Pro, Max, Team and Enterprise; Team and Enterprise organisations need an owner to enable it first, per the web search help page. If citations stop appearing, check that setting.

The Citations API is a separate developer feature with a similar name. The Citations feature grounds responses only in the documents you supply. Web retrieval requires separate web tools, and a returned citation is not independent truth validation.

If you run this check across a program rather than once, keep the ledger and hold list in a Claude Project with your other reference files, so a new chat can see which claims are already rejected.

When the check has to run on every battlecard line

Manual checking works while the owner can reopen every source on schedule. It becomes harder to sustain when claims span multiple competitors' battlecards and source changes require each URL to be reopened. Nothing in a chat session re-checks a claim after it passed.

Steve's battlecards show a status on each claim (Confirmed, Needs verification or Unverified) with its sources. If the owner can keep reopening every source on schedule, the manual check is enough. The competitive intelligence product page covers the monitoring and battlecards.