Skip to main content
Face Authentication is a service for re-authenticating returning users by comparing their live face to a biometric template captured during a previous identity verification. Unlike a full KYC verification, Face Authentication does not require document scanning. The user simply takes a selfie, which is matched against their original verification photo. This makes it ideal for:
  • Account login — add biometric security as a second factor
  • High-risk actions — confirm the user’s identity before transactions, withdrawals, or profile changes
  • Periodic re-verification — ensure the same person is still using the account over time

​
How it works

  1. Generate a Face Authentication token using the Token Generation endpoint, referencing the user’s original scanRef.
  2. Launch the authentication session via the iFrame / Redirect URL or a native SDK.
  3. Receive the result through a webhook callback indicating whether the face matched.

​
Prerequisites

The user must have completed at least one successful identity verification with iDenfy. The original verification’s scanRef is required to generate the authentication token.

​
Next steps

Token Generation

Generate a face authentication session token via API.

iFrame / Redirect

Embed the authentication flow in your application.