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Two-factor authentication and digital verification

Why Spanish banks require an extra verification step for online payments, under EU law.

Last reviewed: 2026-06-15

This guide is not yet verified by Tuchati's editorial review — treat it as a helpful starting point, not a final legal answer.

Overview

Since EU rules (PSD2, and its Strong Customer Authentication requirement) took effect, most online card payments and banking actions in Spain and across the EU require a second verification step beyond just your card details or password.

Requirements

  • Applies to most online card payments and account access within the EEA, and to any Spanish bank account

Step-by-step process

  • When making an online card payment, expect a second verification step after entering your card details — commonly a code sent by SMS, or approval through your bank's app
  • When logging into online banking from a new device, expect a similar additional verification step
  • Approve the request promptly through the specified method (SMS code, app notification, or biometric confirmation)
  • If you don't receive the verification prompt, check your registered phone number and app notification settings are current with your bank

Required documents

  • A working mobile number and/or your bank's app installed, since these are how verification codes and prompts are delivered

Common mistakes

  • Not updating your registered phone number after getting a new number, causing verification codes to fail to arrive
  • Assuming a payment failed because of a technical error, when it actually failed because the required verification step wasn't completed

Practical tips

  • Strong Customer Authentication combines at least two of: something you know (a password), something you have (your phone), and something you are (biometrics) — most Spanish banks use app-based approval or SMS codes as the practical version of this
  • Keep your bank's app installed and notifications enabled, since app-based approval is often faster and more reliable than waiting for an SMS

How Tuchati can help

If verification steps aren't working and you can't complete a payment or login, Tuchati can help you troubleshoot with your bank.

Two-factor authentication and digital verification — Help Centre — Tuchati