> For the complete documentation index, see [llms.txt](https://cmp.docs.sirdata.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cmp.docs.sirdata.net/en/consent-transmission-standards/google-consent-mode/fix-implementation-errors/missing-update-signal.md).
# Missing \`update\` signal
#### Description
The `update` signal in Google Consent Mode is **not being sent**. This signal is required to communicate the user’s **final consent decision** (accept, reject, or customize). Without it, Google assumes no decision was made and may disable features by default.
#### Possible causes
* The script that calls `gtag('consent', 'update', {...})`:
* is **loaded too late** in the page;
* is **using the `defer` attribute**, which delays execution;
* is **altered or cached** by an optimization system such as **Rocket Loader** (Cloudflare), a CDN, or a performance plugin.
* The script is **loaded after Google Tag Manager**, which may prevent the signal from reaching Google tags in time.
#### What to check
**Recommended checks:**
* Ensure that the script containing `gtag('consent', 'update', {...})` is:
* **loaded without `defer` or `async` attributes**;
* **placed at the top of the ``**, **before any other script**, especially **before the Google Tag Manager container**;
* **not altered or delayed** by optimization tools (CDNs, Rocket Loader, etc.).
* Use browser developer tools or Google Tag Assistant to confirm that the `update` signal is correctly triggered.
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