Yes – Ingenico’s biometric payment flow is built as an opt‑in feature. During enrollment the terminal runs a liveness check, captures the biometric trait and stores it as an encrypted, one‑way template only after the shopper gives explicit consent (GDPR‑required opt‑in). If a consumer later decides they no longer want to use biometric authentication, they can disable the feature or delete the stored template from the device, effectively opting out of biometric payments.