Google now warns that Merchant Center products whose price or availability changes more than once per day may be "disapproved instead of updated if we detect a mismatch." The company added the language in a revision to its Merchant Center help document — a change Hana Kobzova of PPC News Feed dates to September 27.

The new wording tightens Google's handling of feeds that fluctuate faster than its systems can reconcile.

What does the updated policy say?

The revised help document states:

"Automations may not work for products with frequent price or availability value changes (for example more than once per day). The product may be disapproved instead of updated if we detect a mismatch. We may also stop updates if the total number of detected mismatches becomes too large."

That is a two-step escalation. First, a single mismatch between what the feed says and what Google detects can flip a product to disapproved status rather than trigger a refresh. Second, if mismatches pile up, Google says it may halt updates for the product altogether.

How do we know this is confirmed?

This is a confirmed change to Google's own documentation, not tool-signal speculation. The help page itself now carries the new language, and it can be compared against an archived version of the previous document to see the full set of edits. The revision goes beyond the mismatch policy — the document contains substantially more changes than this single section alone.

Kobzova flagged the timing on PPC News Feed, writing: "On September 27, the help page was revised to indicate that products might be disapproved if the total detected mismatches become too large."

Who does this affect?

The exposure is concentrated among merchants and retailers that push frequent feed updates through automations:

• Retailers running dynamic pricing that reprices items multiple times per day
• Aggregators and marketplaces where availability flips rapidly across sellers
• Comparison-shopping and affiliate feed operations with high update cadence
• PPC teams using automated feed rules in Merchant Center

For these site types, the practical risk is no longer just stale data in Shopping ads and free listings. A mismatch that once triggered an automatic update can now result in item disapproval — removing the product from eligibility until the issue is resolved.

What should merchants watch next?

Feed managers should check how often their systems push price and availability changes per product per day, and reconcile that against what Google detects on the landing page. Watch for disapprovals tied to mismatch detection in Merchant Center diagnostics, and monitor the help document for further revisions, since Google has shown it is actively editing this page and additional policy tightening may follow.