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One Time Password: Face the future of access.

With IDnow’s One Time Password (OTP) authentication, you can add an extra layer of security to critical moments – like onboarding, signing, and sensitive account actions – without slowing down your users. Delivered instantly via SMS, OTPs ensure your users are who they say they are, right when it matters most.

Seamless security, one code at a time.

Whether you’re verifying a phone number, activating a digital signature, or adding step-up security to your flows, OTP is a trusted tool for real-time authentication. It’s fast, familiar, and frictionless – making it easy for genuine users to prove their identity, while blocking bad actors at the door.

How we authenticate using SMS:

Here’s how we harness the power of single-use, time-limited codes to verify possession and intent at critical moments.

No passwords, no downloads – just enter your mobile number and receive a unique, time-limited code by SMS. It’s proof of possession, made effortless.

Reality Check: Security in Action

A fraudster tries to onboard with someone else’s phone number. The real user receives the OTP, while the imposter is left out – access denied, risk averted.

When it’s time to sign a contract or authorize a transaction, a one-time code is sent directly to the user’s phone. Only the rightful owner can enter the code and complete the signature – ensuring every digital signature is genuine, secure and signed with confidence.

Reality Check: Security in Action

A user initiates a qualified electronic signature. Before the process completes, they must enter the OTP sent to their phone. Only the true owner can finish the signing—protecting against remote fraud.

Regulations evolve – so does OTP. In some single-session QES flows, if strong identification has already taken place, the OTP step can be skipped, streamlining the process while staying fully compliant with the latest regulatory standards.

Reality Check: Security in Action

A customer completes identity verification and is ready to sign. Since strong identification just occurred, the OTP step is skipped – speeding up the experience, without sacrificing security or compliance.

Learn more about how we provide Qualified Electronic Signatures and other Trust Services for a truly end-to-end customer experience

Why businesses choose IDnow One-Time Passwords:

  • Instant, familiar, and user-friendly – no extra apps or hardware
  • Time-limited, unique codes for maximum security
  • Effortless integration into any onboarding, signing, or authentication flow
  • Fully compliant with regulatory requirements
  • Designed for seamless, secure digital experiences at scale
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Security That Moves at Your Speed.

OTPs are the fast, proven way to add certainty to your digital world – blocking fraud, verifying users, and powering trust in every interaction. With IDnow, you never have to choose between security and user experience.

Built to work in your world.

Integrate OTP Authentication into your existing workflows with minimal effort. Whether you need an SDK, an API, or orchestration through the IDnow Identity Trust Platform, we provide scalable, privacy-first identity authentication that meet the needs of modern digital businesses. 

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One Time Password: Instant Codes, Instant Confidence.

Empower your business with authentication that’s as swift as it is secure. IDnow OTP lets you quickly verify users when it matters most, keep fraudsters out, and deliver digital experiences that build real trust – every time.

Discover how a single code can make all the difference.

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