> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://support.chargeforstripe.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# How do I activate fingerprint authentication?

Go to the Settings section and scroll down to the ‘Lock’ section and switch “Use Fingerprint” to the on position. You can switch between PIN or fingerprint authentication by toggling these switches on or off, but one will always be selected as this is essential for security purposes.



![](https://storage.crisp.chat/users/helpdesk/website/eb94afd6fd578800/charge-for-stripe-settings-150_1iioakh.png)