> ## Documentation Index
> Fetch the complete documentation index at: https://docs.jelou.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# How does it work?

> See the user stages for each reference image mode.

The experience depends on the mode selected in the Biometrics node. In both modes, the user completes liveness and the system compares the selfie with a reference image.

> [tab] Civil Registry photo
>
> Available only in Ecuador.
>
> **1. Open the link**
>
> The user opens a unique WhatsApp link and accepts the terms.
>
> **2. Enter identity data**
>
> The user enters a 10-digit ID and fingerprint code. The experience retrieves the Civil Registry photo.
>
> **3. Complete liveness**
>
> The user takes a guided selfie from the camera.
>
> **4. Wait for comparison**
>
> The selfie is compared with the Civil Registry photo and the result returns to WhatsApp or `callbackUrl`.

> [tab] Photo supplied in the flow
>
> Available in any country.
>
> **1. Open the link**
>
> The user opens a unique WhatsApp link and accepts the terms.
>
> **2. Complete liveness**
>
> The user takes a guided selfie without entering data or seeing document steps.
>
> **3. Wait for comparison**
>
> The selfie is compared with `referenceImageUrl` and the result returns to WhatsApp or `callbackUrl`.

> [card] [Next: How to connect](https://docs.jelou.ai/en/guides/integraciones/identidad/facial-biometrics/how-to-connect.md)
>
> Connect Facial Biometrics to a flow.


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