> For the complete documentation index, see [llms.txt](https://docs.0xkyc.id/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.0xkyc.id/developer-guides/client-or-server-guide/sunscreen-uniquness-verification/working-with-the-uuid.md).

# Working with the UUID

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We issue the UUID so that you can make the core decisions of what to do with duplicate individuals found afterward
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### The power is in your hands

Once you have a users UUID, you can store it in an internal database and keep track of all duplicated users, as they appear. With the UUID you can then make the decision to block, warn, or allow any user, in the future or in real time!