# Face Authentication Check

### About service

The Face Authentication Check is a **facial biometric authentication** service.

It uses our **face match** and **liveness** engine to authenticate your customer's facial attributes against their **enrolled face**.

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This type of check requires a customer's face to be **enrolled** first.
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We recommend running this type of check through our [Hosted Solution](/documentation/sdks/web-integrations/hosted-solution-quick-guide.md), [Web SDK](/documentation/sdks/web-integrations/web-sdk-quick-guide.md), or native [Mobile SDKs](/documentation/quick-guides/mobile-sdk-guide.md).
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[Learn about the Face Authentication Checks API.](/documentation/api-reference/check-types/face-authentication-check.md)
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### Common use cases

Use Face Authentication when you need fast **biometric customer authentication**:

* **Passwordless login**: Replace passwords with selfie-based face authentication.
* **Account recovery**: Re-authenticate users for **account reactivation** and **unlock** flows.
* **Step-up authentication**: Add a biometric challenge for high-risk actions.
* **Periodic KYC re-verification**: Confirm the same user returns over time.

### Analysis performed

The Face Authentication Check confirms whether a customer’s **live face** matches their previously **enrolled face**.

The diagram below outlines the key analysis categories.

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![Face Authentication Overview: Selfie-based Biometric Matching and Liveness Scoring](/files/rLDsJeCn9s9UUPn3mFFw)

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**Detailed verification checks**

<table><thead><tr><th width="208.7734375">Analysis</th><th>Verifications Performed</th></tr></thead><tbody><tr><td><strong>Face authentication</strong></td><td>Determines whether the live selfie matches the enrolled face.</td></tr><tr><td><strong>Liveness scoring</strong></td><td>Returns a confidence score between 0–100%. 100% indicates a highly reliable live presence. 0% indicates a likely spoof attempt.</td></tr></tbody></table>

### Check duration

A Face Authentication Check takes an average of **2 seconds** to complete.

### Related checks

You’ll typically run Face Authentication Check alongside:

* [Identity Check](/documentation/product-guides/biometric-and-liveness-verification/identity-check.md) runs selfie liveness and face match against an ID photo. It can also enrol the face.
* [Enhanced Identity Check](/documentation/product-guides/biometric-and-liveness-verification/enhanced-identity-check.md) when you need video challenges for higher assurance.
* [Device Intelligence](/documentation/product-guides/digital-fraud-intelligence/device-intelligence-check.md) to add device-level fraud signals to authentication flows.

### Related topics

Use these docs when designing end-to-end onboarding and authentication journeys:

* [Workflows](/documentation/product-guides/compliance-studio/workflows.md) to orchestrate step-up authentication and follow-up decisions.
* [Hosted Solution](/documentation/sdks/web-integrations/hosted-solution-quick-guide.md), [Web SDK](/documentation/sdks/web-integrations/web-sdk-quick-guide.md), and [Mobile SDKs](/documentation/quick-guides/mobile-sdk-guide.md) for guided selfie capture.


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