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This guide describes what you can customize in WebView, what cannot be changed, and the legal and security checks to consider before go-live.

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UI customization

In WebView you can set:
  • Background color
  • Text color
  • Button color
  • Stepper color
  • UI language (Spanish / English)
  • Optional user language control
The stepper color also applies to the widgets.
If you enable user language control, a selector is shown so the user can choose Spanish or English at any step.

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Non-editable elements

To keep verification quality, these are not customizable:
  • Face capture widgets
  • Document capture widgets
You must add a public Terms and Conditions URL in the WebView UI. The document must explicitly cover:
  • Use of personal and biometric data
  • Data storage
  • Data processing
Without the public Terms and Conditions link, the flow does not meet minimum implementation requirements.

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Additional security

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Advanced document image check

Enables comparison between the main document photo and the thumbnail (ghost).
Enable only when the document photo is clear; low quality may increase rejection rates.

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Face comparison

Compares the liveness photo to the photo from the document.
  • Low: 65%
  • Standard: 80%
  • Strict: 90%

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Pre-publish review

Recommended checklist:
  • UI colors set correctly (background, text, buttons, stepper)
  • Widgets visible and unmodified
  • Terms link visible and working
  • End-to-end tests completed on WhatsApp