> For the complete documentation index, see [llms.txt](https://developers.didomi.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.didomi.io/cmp/mobile-sdk/consent-notice.md).

# Consent notice

The notice is required by the EU legislation on cookies and other tracking technologies and is also used for informing the user on other GDPR data processing and collecting consent. Before collecting data or processing it, you must let your users know that your app is using such tools and why, as well as give them options to opt out.

We are assuming that you already have an API key. If not, please go to our [website](https://www.didomi.io) and sign up for an account.

**Topics**

* [Customize the notice](/cmp/mobile-sdk/consent-notice/customize-the-notice.md)
* [Customize the theme](/cmp/mobile-sdk/consent-notice/customize-the-theme.md)


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