Google now says fact-check AI content before you publish (October 2026), plus the September spam update

Google Search Central’s page Using generative AI content says Last updated 2026-10-01 UTC (1 Oct 2026, 05:30 IST). The line that changed the editing bar is this one, quoted from that page:

It is critical to manually factcheck and review all AI-generated content for accuracy and trustworthiness before publishing.

The same paragraph says the review also applies to metadata: title elements, meta description elements, structured data, and alternate text for images, because those can appear in Search results. Google’s spelling on the page is “factcheck,” one word.

This is a publishing rule, not a tool review. ShopperCove is not recommending an auto-content, ebook-filler, or article-database product here. There are no affiliate links and no paid ads.

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What the guidance page says about model output

The page’s accuracy section says generative models don’t retrieve facts. They predict a likely sequence of words based on their training data. Because of that, outputs may contain inaccuracies, which the page also calls hallucinations.

That is why the fact-check line covers the whole publish unit, not only the body copy:

• The visible article
• The title
• The meta description
• Structured data
• Image alt text

For structured data, the page also says to follow the general guidelines, the policies for the individual search feature, and to validate the markup so it stays eligible for those features.

The scaled-content warning is on the same document: using generative AI or similar tools to generate many pages without adding value for users may violate Google’s spam policy on scaled content abuse. The page points at the Search Quality Rater Guidelines for how raters evaluate scaled content abuse (section 4.6.5) and main content created with little to no effort, originality, or added value (section 4.6.6). It also says those guidelines are not a guide to ranking first, raters use them to evaluate ranking systems, and their ratings don’t directly influence ranking.

A separate section, “Give users context,” says that telling readers how a piece was created can help, including background on how automation was used and image metadata.

The same page, as fetched 3 Oct 2026, also states Google Merchant Center rules: AI-generated images must carry IPTC DigitalSourceType metadata of TrainedAlgorithmicMedia, and AI-generated product title and description attributes must be specified separately and labeled as AI-generated. This article does not claim those Merchant Center sentences were the 1 Oct edit. They are what the current page says. The sentences this post treats as the October guidance are the “predict a likely sequence of words” explanation, the hallucination clause, and the manual fact-check requirement (including title, meta description, structured data, and alt text).

The September 2026 spam update is a different page

Do not fold the fact-check edit into a rumor about a second spam rollout.

Google’s status incident September 2026 spam update says the incident began at 2026-09-24 09:15, and that times on that dashboard are US/Pacific. The only row on the incident, checked 3 Oct 2026, is:

• 24 Sep 2026, 09:15 PDT — “Released the September 2026 spam update, which applies globally and to all languages. The rollout may take up to two weeks to complete.”

09:15 PDT is 24 Sep 2026, 21:45 IST.

That fetch showed no completion note. The page does not say the rollout finished, and it does not give a second start time. A “phase two on 30 Sep” claim is not on this status page. This article does not use 30 Sep as a spam-update phase.

“Up to two weeks” is Google’s own bound, starting from the 24 Sep release note. It is not a promise that rankings settle on a particular day, and it is not a claim ShopperCove measured.

The fact-check page and the spam-update incident answer different questions. One tells you to review AI output before it goes live. The other is a global spam-update rollout that was still described as in progress, with no end timestamp, on 3 Oct 2026.

A review pass that matches the page

Use this before you publish model-written copy. It tracks the fields Google named. It is not a ranking trick, and it does not replace the two source pages.

1. Read the body against a source you can open. The model predicted words; it did not look up your citations unless you did.
2. Check the title and meta description separately. A fluent title can still name the wrong version, date, or product.
3. Check structured data against the visible text, then validate the markup.
4. Check image alt text. Alt text is copy. It can be wrong even when the picture is right.
5. If a page exists mostly because a tool could emit it, and it does not add something a reader could not already get, treat that as the scaled-content problem the guidance page already warned about.
6. Where automation wrote the page, consider saying how it was produced, in language your readers actually use.
7. For product listings in Merchant Center, follow the image-metadata and AI-labeled title/description lines on that same Google page rather than pasting unlabeled model text into the feed.

The existing ShopperCove pieces on answer engines and traffic in the AI search era are about being cited and getting visits. They are not a substitute for this fact-check. If the page you are about to publish is a framework note, the same review applies to posts such as React 19.3 view transitions and the SvelteKit 3 migration checklist: versions and dates still have to match the vendor page.

What this post will not say

• It will not say Google confirmed a spam-update phase two on 30 Sep. The status incident does not say that.
• It will not say the rollout is finished. The 3 Oct 2026 fetch had no completion row.
• It will not recommend software that auto-fills articles or ebooks from a URL or a content database. That workflow is the opposite of the fact-check line.
• It will not invent traffic lifts, ranking deltas, or quotes beyond the two Google pages above.

Sources

• Google Search Central: guidance on using generative AI content (Last updated 2026-10-01 UTC)
• Google Search status: September 2026 spam update (began 24 Sep 2026, 09:15 US/Pacific; no completion note on the 3 Oct 2026 fetch)

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